fixed += bug with non-char pointers

tcc 0.9.25 can't compile musl (or any libc, probably).
will probably need to write libc for tcc, then compile
gcc or a later version of tcc with it

05/main.c

@@ -1,6 +1,6 @@
 /* #define _STDLIB_DEBUG */
 /* #include <math.h> */
-/* #include <stdio.h> */
+#include <stdio.h>
 /* #include <signal.h> */
 /* #include <stdlib.h> */
 /* #include <string.h> */
@@ -9,10 +9,10 @@
 /* #include <setjmp.h> */
 /*  */
 
-char *p = "a";
-char s[] = "hello\0there";
-
-int _main(int argc, char **argv) {
-	return s;
+int main(int argc, char **argv) {
+	int *p = 0x100;
+	p += 1;
+	printf("%p\n",p);
+	return 0;
 }