Remove unneeded NULL at end of struct.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13673 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/img2.c

@@ -399,7 +399,6 @@ AVInputFormat image2pipe_demuxer = {
     img_read_header,
     img_read_packet,
     img_read_close,
-    NULL,
 };
 #endif