fix: crash on cast i32 to u32

src/arch/z80/backend/common.py

@@ -392,6 +392,9 @@ def to_long(stype: DataType) -> list[str]:
         output.append("ld e, a")
         output.append("ld d, a")
 
+    elif stype in (U32_t, I32_t):
+        return []
+
     elif stype == U16_t:
         output.append("ld de, 0")
 

tests/functional/arch/zx48k/cast_i32tou32.asm

@@ -0,0 +1,42 @@
+	org 32768
+.core.__START_PROGRAM:
+	di
+	push ix
+	push iy
+	exx
+	push hl
+	exx
+	ld (.core.__CALL_BACK__), sp
+	ei
+	jp .core.__MAIN_PROGRAM__
+.core.__CALL_BACK__:
+	DEFW 0
+.core.ZXBASIC_USER_DATA:
+	; Defines USER DATA Length in bytes
+.core.ZXBASIC_USER_DATA_LEN EQU .core.ZXBASIC_USER_DATA_END - .core.ZXBASIC_USER_DATA
+	.core.__LABEL__.ZXBASIC_USER_DATA_LEN EQU .core.ZXBASIC_USER_DATA_LEN
+	.core.__LABEL__.ZXBASIC_USER_DATA EQU .core.ZXBASIC_USER_DATA
+_a:
+	DEFB 00, 00, 00, 00
+.core.ZXBASIC_USER_DATA_END:
+.core.__MAIN_PROGRAM__:
+	ld hl, (_a)
+	ld de, (_a + 2)
+	ld (_a), hl
+	ld (_a + 2), de
+	ld hl, 0
+	ld b, h
+	ld c, l
+.core.__END_PROGRAM:
+	di
+	ld hl, (.core.__CALL_BACK__)
+	ld sp, hl
+	exx
+	pop hl
+	exx
+	pop iy
+	pop ix
+	ei
+	ret
+	;; --- end of user code ---
+	END

tests/functional/arch/zx48k/cast_i32tou32.bas

@@ -0,0 +1,4 @@
+DIM a as ULong
+
+LET a = INT(a)
+