dosbox native ZMBV decoder, courtesy of Kostya

Originally committed as revision 5000 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avienc.c

@@ -195,6 +195,7 @@ const CodecTag codec_bmp_tags[] = {
     { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
     { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
     { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
+    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
     { CODEC_ID_RAWVIDEO, 0 },
     { 0, 0 },
 };