smacker video decoder uses reget_buffer, set CODEC_CAP_DR1

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@19103 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/smacker.c

@@ -701,6 +701,7 @@ AVCodec smacker_decoder = {
     NULL,
     decode_end,
     decode_frame,
+    CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Smacker video"),
 };