Re-lock sources upon suspend / sleep?

Hi

Ive searched but cant find anything. I have one XBMC profile and I setup the master lock and locked the sources that contain content not suitable for kids. If I reboot then only kids movies and tv shows are visible. I can then unlock sources and enter the pin code to see all content.

However if I suspend / sleep the HTPC upon resuming the sources are still all unlocked.

Obviously I can lock sources before I put it to sleep but I keep forgetting. Anyway to automate it?

Thanks