Call to undefined method PDOException::message() error in services_resource_execute_index_query()

While debugging a custom resource, I was incorrectly constructing my query causing an exception to be raised in services_resource_execute_index_query(). However, the exception handling code raised this exception:

Call to undefined method PDOException::message() in PATH_TO_MY_DRUPAL_INSTALL/s
ites/default/modules/contrib/services/services.module on line 555

I believe that this can be fixed by changing line 555 of services.module to read:

return services_error(t('Invalid query provided, double check that the fields and parameters you defined are correct and exist. ' . $e->getMessage()), 406);

i.e. changing $e->message() to $e->getMessage()