zmbv decoder uses get_buffer, set CODEC_CAP_DR1

Originally committed as revision 19112 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/zmbv.c

@@ -664,6 +664,7 @@ AVCodec zmbv_decoder = {
     NULL,
     decode_end,
     decode_frame,
+    CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
 };