fix initialization bug in which execution overwrites essential data tables which causes trouble on subsequent runs if decoder is not disposed first
fix initialization bug in which execution overwrites essential data
tables which causes trouble on subsequent runs if decoder is not
disposed first


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@3214 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg