put the message into the assert in aa_realloc

src/parsers/bind.c

@@ -22,7 +22,7 @@ static void *aa_alloc(HAllocator *allocator, size_t size)
 static void *aa_realloc(HAllocator *allocator, void *ptr, size_t size)
 {
     HArena *arena = ((ArenaAllocator *)allocator)->arena;
-    assert(0);  // XXX realloc for arena allocator
+    assert(((void)"XXX need realloc for arena allocator", 0));
     return NULL;
 }