xbmc/xbmc — pull request #1878 by fetzerch (2012-12-02 10:28:18+00:00)
Title: pvr: Fix crash when opening Channels OSD while playing non PVR video

This fixes a crash when trying to open the channels OSD
while playing a normal (non PVR) video.

This can accidentally happen for example when having a button
mapping to XBMC.ActivateWindow(PVROSDChannels) in FullscreenVideo.