stream_pvr: Fix fd check, -1 indicates invalid, not 0.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36677 b3059339-0415-0410-9bf9-f77b7e298cf2
video/out: do remaining config to reconfig replacements

The main difference between the old and new callbacks is that the old
callbacks required passing the window size, which is and always was very
inconvenient and confusing, since the window size is already in
vo->dwidth and vo->dheight.
vo_wayland: fix confusion of video and window sizes
audio/filter: remove redundant log message prefixes

These are now appended automatically, so you'd get them twice before
this commit.