allow negative pre-recording padding
the german "Sky" pay-tv does not use the EPG-running state correctly. They still blend in some commercials, sometimes for many minutes.
It's more a kind of personal experience when setting up autorecording for a tv series to estimate the still running commercials until the start of the series..
So, e.g. for Stargate SG1, I need to set about "-2 min." pre-padding and "-5 min." post-padding to do accurate recording.
TVH does not allow negative arguments.
Please include. Thanks!