Function calls are being emitted with the right int for args

src/intermediate_code.c

@@ -52,7 +52,7 @@ bool S_IsEmpty(Stack *s){
 }
 
 int S_Size(Stack *s){
-    if (s == NULL || !S_IsEmpty(s)) {
+    if (s == NULL || S_IsEmpty(s)) {
             return 0;
     }
     return s->size;