last_picture should be never == NULL (it was with dr1) this might fix a segfault with error concealment
last_picture should be never == NULL (it was with dr1) this might fix a segfault with error concealment


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@837 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

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