Fix 64-bit compile for pointer set

stb.h

@@ -7353,7 +7353,7 @@ STB_EXTERN void ** stb_ps_fastlist(stb_ps *ps, int *count);
 //     but some entries of the list may be invalid;
 //     test with 'stb_ps_fastlist_valid(x)'
 
-#define stb_ps_fastlist_valid(x)   ((unsigned int) (x) > 1)
+#define stb_ps_fastlist_valid(x)   ((stb_uinta) (x) > 1)
 
 #ifdef STB_DEFINE
 
@@ -7374,8 +7374,6 @@ typedef struct
 #define GetBucket(p)    ((stb_ps_bucket *) ((char *) (p) - STB_ps_bucket))
 #define EncodeBucket(p) ((stb_ps *) ((char *) (p) + STB_ps_bucket))
 
-typedef char stb__verify_bucket_heap_size[sizeof(stb_ps_bucket) == 16];
-
 static void stb_bucket_free(stb_ps_bucket *b)
 {
    free(b);