message: [Go] Add missing namespace when using Object API
diff: @@ -1011,7 +1011,9 @@ class GoGenerator : public BaseGenerator {
  NativeType(field.value.type) + ", " + length + ")\n";
  code += "\tfor j := 0; j < " + length + "; j++ {\n";
  if (field.value.type.element == BASE_TYPE_STRUCT) {
  - code += "\t\tx := " + field.value.type.struct_def->name + "{}\n";
  + code += "\t\tx := " +
  + WrapInNameSpaceAndTrack(*field.value.type.struct_def) +
  + "{}\n";
  code += "\t\trcv." + field_name_camel + "(&x, j)\n";
  }
  code += "\t\tt." + field_name_camel + "[j] = ";
  