"Resume from" is broken for pvr recordings.
The PR contains two commits: 08211a9 fixes a check against the (I believe) wrong capability, and c8231cf does the actual fix of recording resumepoints.
I have kept it as separate commits for clarity. Will squash if deemed necessary.
[pvr] fix: Check for SupportsLastPlayedPosition instead of SupportsRe…
…cordingPlayCount when getting/setting last played position for recording.
[pvr] Fix get last played position for recording: use -1 instead of 0…
… as default rc for GetRecordingLastPlayedPosition as 0 is treated as a valid resumepoint, whereas -1 is not.