Make more use of optional chaining. NFC (#23521)

I found all these sites using:

```
$ git grep -n "if (\(.*\) && \1\>.*)" src/
```

Author: sbc100

src/lib/libbrowser.js

@@ -552,7 +552,7 @@ var LibraryBrowser = {
       }
       var w = wNative;
       var h = hNative;
-      if (Module['forcedAspectRatio'] && Module['forcedAspectRatio'] > 0) {
+      if (Module['forcedAspectRatio'] > 0) {
         if (w/h < Module['forcedAspectRatio']) {
           w = Math.round(h * Module['forcedAspectRatio']);
         } else {

src/lib/libeventloop.js

@@ -489,7 +489,7 @@ LibraryJSEventLoop = {
     }
 
     if (!noSetTiming) {
-      if (fps && fps > 0) {
+      if (fps > 0) {
         _emscripten_set_main_loop_timing({{{ cDefs.EM_TIMING_SETTIMEOUT }}}, 1000.0 / fps);
       } else {
         // Do rAF by rendering each frame (no decimating)

src/lib/libglemu.js

@@ -3574,7 +3574,7 @@ var LibraryGLEmulation = {
     for (var i = 0; i < n; i++) {
       var id = {{{ makeGetValue('vaos', 'i*4', 'i32') }}};
       GLEmulation.vaos[id] = null;
-      if (GLEmulation.currentVao && GLEmulation.currentVao.id == id) GLEmulation.currentVao = null;
+      if (GLEmulation.currentVao?.id == id) GLEmulation.currentVao = null;
     }
   },
   $emulGlIsVertexArray: (array) => {

src/lib/libsdl.js

@@ -1108,7 +1108,7 @@ var LibrarySDL = {
     // since the browser engine handles that for us.  Therefore, in JS we just
     // maintain a list of channels and return IDs for them to the SDL consumer.
     allocateChannels(num) { // called from Mix_AllocateChannels and init
-      if (SDL.numChannels && SDL.numChannels >= num && num != 0) return;
+      if (SDL.numChannels >= num && num != 0) return;
       SDL.numChannels = num;
       SDL.channels = [];
       for (var i = 0; i < num; i++) {
@@ -3506,7 +3506,7 @@ var LibrarySDL = {
   SDL_JoystickGetAxis__proxy: 'sync',
   SDL_JoystickGetAxis: (joystick, axis) => {
     var gamepad = SDL.getGamepad(joystick - 1);
-    if (gamepad && gamepad.axes.length > axis) {
+    if (gamepad?.axes.length > axis) {
       return SDL.joystickAxisValueConversion(gamepad.axes[axis]);
     }
     return 0;
@@ -3519,7 +3519,7 @@ var LibrarySDL = {
   SDL_JoystickGetButton__proxy: 'sync',
   SDL_JoystickGetButton: (joystick, button) => {
     var gamepad = SDL.getGamepad(joystick - 1);
-    if (gamepad && gamepad.buttons.length > button) {
+    if (gamepad?.buttons.length > button) {
       return SDL.getJoystickButtonState(gamepad.buttons[button]) ? 1 : 0;
     }
     return 0;

src/lib/libstack_trace.js

@@ -50,14 +50,14 @@ var LibraryStackTrace = {
       var column = 0;
 
       var parts = chromeRe.exec(line);
-      if (parts && parts.length == 5) {
+      if (parts?.length == 5) {
         symbolName = parts[1];
         file = parts[2];
         lineno = parts[3];
         column = parts[4];
       } else {
         parts = newFirefoxRe.exec(line) || firefoxRe.exec(line);
-        if (parts && parts.length >= 4) {
+        if (parts?.length >= 4) {
           symbolName = parts[1];
           file = parts[2];
           lineno = parts[3];

src/lib/libtrace.js

@@ -92,7 +92,7 @@ var LibraryTracing = {
     },
 
     configureForGoogleWTF: () => {
-      if (window && window['wtf']) {
+      if (window?.['wtf']) {
         EmscriptenTrace.googleWTFEnabled = true;
       } else {
         out('GOOGLE WTF NOT AVAILABLE TO ENABLE');

src/lib/libtty.js

@@ -113,7 +113,7 @@ addToLibrary({
         }
       },
       fsync(tty) {
-        if (tty.output && tty.output.length > 0) {
+        if (tty.output?.length > 0) {
           out(UTF8ArrayToString(tty.output));
           tty.output = [];
         }
@@ -150,7 +150,7 @@ addToLibrary({
         }
       },
       fsync(tty) {
-        if (tty.output && tty.output.length > 0) {
+        if (tty.output?.length > 0) {
           err(UTF8ArrayToString(tty.output));
           tty.output = [];
         }

src/lib/libwebgl.js

@@ -1184,7 +1184,7 @@ for (/**@suppress{duplicate}*/var i = 0; i <= {{{ GL_POOL_TEMP_BUFFERS_SIZE }}};
       }
       // Make sure the canvas object no longer refers to the context object so
       // there are no GC surprises.
-      if (GL.contexts[contextHandle] && GL.contexts[contextHandle].GLctx.canvas) {
+      if (GL.contexts[contextHandle]?.GLctx?.canvas) {
         GL.contexts[contextHandle].GLctx.canvas.GLctxObject = undefined;
       }
 #if PTHREADS

src/polyfill/bigint64array.js

@@ -29,7 +29,7 @@ if (typeof globalThis.BigInt64Array === "undefined") {
       }
       var orig_array;
       if (!ArrayBuffer.isView(array)) {
-        if (array.constructor && array.constructor.name === "ArrayBuffer") {
+        if (array.constructor?.name === "ArrayBuffer") {
           array = new Uint32Array(array);
         } else {
           orig_array = array;

test/other/codesize/test_codesize_cxx_ctors1.gzsize

@@ -1 +1 @@
-8353
+8350

test/other/codesize/test_codesize_cxx_ctors1.jssize

@@ -1 +1 @@
-20285
+20267

test/other/codesize/test_codesize_cxx_ctors2.gzsize

@@ -1 +1 @@
-8335
+8333

test/other/codesize/test_codesize_cxx_ctors2.jssize

@@ -1 +1 @@
-20253
+20235

test/other/codesize/test_codesize_cxx_except.gzsize

@@ -1 +1 @@
-9352
+9351

test/other/codesize/test_codesize_cxx_except.jssize

@@ -1 +1 @@
-24053
+24035

test/other/codesize/test_codesize_cxx_except_wasm.gzsize

@@ -1 +1 @@
-8298
+8296

test/other/codesize/test_codesize_cxx_except_wasm.jssize

@@ -1 +1 @@
-20178
+20160

test/other/codesize/test_codesize_cxx_except_wasm_legacy.gzsize

@@ -1 +1 @@
-8298
+8296

test/other/codesize/test_codesize_cxx_except_wasm_legacy.jssize

@@ -1 +1 @@
-20178
+20160

test/other/codesize/test_codesize_cxx_lto.gzsize

@@ -1 +1 @@
-8365
+8361

test/other/codesize/test_codesize_cxx_lto.jssize

@@ -1 +1 @@
-20360
+20342

test/other/codesize/test_codesize_cxx_mangle.gzsize

@@ -1 +1 @@
-9359
+9357

test/other/codesize/test_codesize_cxx_mangle.jssize

@@ -1 +1 @@
-24053
+24035

test/other/codesize/test_codesize_cxx_noexcept.gzsize

@@ -1 +1 @@
-8353
+8350

test/other/codesize/test_codesize_cxx_noexcept.jssize

@@ -1 +1 @@
-20285
+20267

test/other/codesize/test_codesize_files_js_fs.gzsize

@@ -1 +1 @@
-7661
+7657

test/other/codesize/test_codesize_files_js_fs.jssize

@@ -1 +1 @@
-18831
+18813