message: Fix a typo in model.cc error message.
diff: @@ -136,7 +136,7 @@ TfLiteStatus InterpreterBuilder::BuildLocalIndexToRegistrationMapping() {
  }
  } else if (!opcode->custom_code()) {
  error_reporter_->Report(
  - "Operator with builtin_code==0 has no custom_code.\n");
  + "Operator with CUSTOM builtin_code has no custom_code.\n");
  status = kTfLiteError;
  } else {
  const char* name = opcode->custom_code()->c_str();
  