dvdplayer: make sure member variables are inited in constructor

Conflicts:
	xbmc/cores/dvdplayer/DVDInputStreams/DVDInputStreamFFmpeg.cpp
[m3u8/airplay] - strip off any url options before checking for m3u8 filename - fixes stream quality selection (e.x. for airplay ^^)

Conflicts:
	xbmc/cores/dvdplayer/DVDPlayer.cpp