Fixed class_getSuperclass() implementation.

runtime.c

@@ -394,8 +394,13 @@ const char * class_getName(Class cls)
 	return class_get_class_name(cls);
 }
 
+void __objc_resolve_class_links(void);
 Class class_getSuperclass(Class cls)
 {
+	if (!CLS_ISRESOLV(cls))
+	{
+		__objc_resolve_class_links();
+	}
 	return class_get_super_class(cls);
 }