Fix Resource::get_rid override not working in GDExtension

Author: Pylgos

core/io/resource.cpp

@@ -424,8 +424,7 @@ RID Resource::get_rid() const {
 		}
 	}
 	if (_get_extension() && _get_extension()->get_rid) {
-		RID ret;
-		ret.from_uint64(_get_extension()->get_rid(_get_extension_instance()));
+		RID ret = RID::from_uint64(_get_extension()->get_rid(_get_extension_instance()));
 		if (ret.is_valid()) {
 			return ret;
 		}