bethesda vid decoder uses reget_buffer, set CODEC_CAP_DR1

Originally committed as revision 19092 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/bethsoftvideo.c

@@ -138,5 +138,6 @@ AVCodec bethsoftvid_decoder = {
     .init = bethsoftvid_decode_init,
     .close = bethsoftvid_decode_end,
     .decode = bethsoftvid_decode_frame,
+    .capabilities = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Bethesda VID video"),
 };