Added tests for param name clash

Author: boriel

tests/functional/paramnameclash0.asm

@@ -0,0 +1,69 @@
+	org 32768
+__START_PROGRAM:
+	di
+	push ix
+	push iy
+	exx
+	push hl
+	exx
+	ld hl, 0
+	add hl, sp
+	ld (__CALL_BACK__), hl
+	ei
+	ld hl, 1
+	push hl
+	call _test
+	ld hl, 0
+	ld b, h
+	ld c, l
+__END_PROGRAM:
+	di
+	ld hl, (__CALL_BACK__)
+	ld sp, hl
+	exx
+	pop hl
+	exx
+	pop iy
+	pop ix
+	ei
+	ret
+__CALL_BACK__:
+	DEFW 0
+_test:
+	push ix
+	ld ix, 0
+	add ix, sp
+	ld l, (ix+4)
+	ld h, (ix+5)
+	push hl
+	xor a
+	pop hl
+	ld (hl), a
+_test__leave:
+	ld sp, ix
+	pop ix
+	exx
+	pop hl
+	ex (sp), hl
+	exx
+	ret
+ZXBASIC_USER_DATA:
+_a:
+	DEFW __LABEL0
+_a.__DATA__.__PTR__:
+	DEFW _a.__DATA__
+_a.__DATA__:
+	DEFB 00h
+	DEFB 00h
+	DEFB 00h
+	DEFB 00h
+	DEFB 00h
+	DEFB 00h
+__LABEL0:
+	DEFW 0000h
+	DEFB 01h
+; Defines DATA END --> HEAP size is 0
+ZXBASIC_USER_DATA_END:
+	; Defines USER DATA Length in bytes
+ZXBASIC_USER_DATA_LEN EQU ZXBASIC_USER_DATA_END - ZXBASIC_USER_DATA
+	END

tests/functional/paramnameclash0.bas

@@ -0,0 +1,10 @@
+
+DIM a(5) as UByte
+
+REM parameter 'a' clashes with that of the array above
+Sub test(a as UInteger)
+   POKE a, 0
+End Sub
+
+test(1)
+