paplayer: dvdplayercodec - check if seek is possible before trying to seek
Revert "dvdplayer input stream: fix incorrectly set of EOF"

This reverts commit 9c7b7b2b010e10b9eb47eeebd50eee2d9eb7f0e7.
Merge pull request #4624 from FernetMenta/paplayer

paplayer: dvdplayercodec - check if seek is possible before trying to se...