Ensure AVDictionary pointer is initialized.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36456 b3059339-0415-0410-9bf9-f77b7e298cf2
Fix a few memleaks.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36457 b3059339-0415-0410-9bf9-f77b7e298cf2
Pass playing filename to audio outputs.

Use it in pulseaudio to set the stream name.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36458 b3059339-0415-0410-9bf9-f77b7e298cf2