Const correctness fix.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36414 b3059339-0415-0410-9bf9-f77b7e298cf2
Avoid some code duplication.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36415 b3059339-0415-0410-9bf9-f77b7e298cf2
If VDPAU is available enable all VDPAU HWACCELs.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36416 b3059339-0415-0410-9bf9-f77b7e298cf2