Invalid empty value for ctools_export_crud_export

ctools_export_crud_export expects to get an object or export key. If it receives an empty or undefined value it generates an error. There is insufficient checks around the function to prevent a PHP error. Attached is a patch to return out when there is no data present in Drupal\configuration\Storage\StorageCtools. Note that this merely causes the code to complete, the error is still present and may potentially cause other issues. We received the issue with a combination of Search API Views being included in a Page Manager Existing Pages page and we have not been able to isolate the actual offending component.