also check interior pointers on PS (compiler can generate mem offsets)

src/gc.c

@@ -73,7 +73,7 @@ static int_val gc_hash( void *ptr ) {
 #	define GC_MEMCHK
 #endif
 
-#if defined(HL_NX)
+#if defined(HL_NX) || defined(HL_PS)
 #	define GC_INTERIOR_POINTERS
 #endif