AK+Everywhere: Change int to size_t in JsonObject and JsonArray

Author: https://github.com/MaxWipfli
Commit: f45273649f
Pull-request: https://github.com/SerenityOS/serenity/pull/8293
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/awesomekling

Userland/DevTools/Inspector/RemoteObjectPropertyModel.cpp

@@ -22,7 +22,7 @@ int RemoteObjectPropertyModel::row_count(const GUI::ModelIndex& index) const
             return value.as_array().size();
         else if (value.is_object())
             return value.as_object().size();
-        return 0;
+        return (size_t)0;
     };
 
     if (index.is_valid()) {