vmware video decoder uses reget_buffer, set CODEC_CAP_DR1

Originally committed as revision 19113 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/vmnc.c

@@ -520,6 +520,7 @@ AVCodec vmnc_decoder = {
     NULL,
     decode_end,
     decode_frame,
+    CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("VMware Screen Codec / VMware Video"),
 };