Move comment to correct place

The comment about why we have to decref and clear type structs got moved
in one of the previous commits, so move it back to the right place.

Author: pranavrajpal

mypyc/codegen/emitmodule.py

@@ -923,14 +923,14 @@ def generate_module_def(self, emitter: Emitter, module_name: str, module: Module
         emitter.emit_lines('fail:',
                            'Py_CLEAR({});'.format(module_static),
                            'Py_CLEAR(modname);')
-        # the type objects returned from CPyType_FromTemplate are all new references
-        # so we have to decref them
         for name, typ in module.final_names:
             static_name = emitter.static_name(name, module_name)
             if emitter.ctype(typ) == 'PyObject *':
                 emitter.emit_line('Py_CLEAR({});'.format(static_name))
             elif is_tagged(typ):
                 emitter.emit_line('CPyTagged_XDecRef({});'.format(static_name))
+        # the type objects returned from CPyType_FromTemplate are all new references
+        # so we have to decref them
         for t in type_structs:
             emitter.emit_line('Py_CLEAR({});'.format(t))
         emitter.emit_line('return NULL;')