LibWeb/IDL: Make inner type of typedef inherit nullable attribute

Author: https://github.com/Lubrsi
Commit: a9a9614b6b
Pull-request: https://github.com/SerenityOS/serenity/pull/14184
Reviewed-by: https://github.com/Quaker762 ✅
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/linusg ✅
Reviewed-by: https://github.com/sunverwerth

Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator/IDLParser.cpp

@@ -809,7 +809,9 @@ void resolve_typedef(Interface& interface, NonnullRefPtr<Type>& type, HashMap<St
     auto it = interface.typedefs.find(type->name);
     if (it == interface.typedefs.end())
         return;
+    bool is_nullable = type->nullable;
     type = it->value.type;
+    type->nullable = is_nullable;
     if (!extended_attributes)
         return;
     for (auto& attribute : it->value.extended_attributes)