When playing

ftp://ftp.mplayerhq.hu/MPlayer/samples/V-codecs/QPEG/VWbig6.avi with my
decoder (should appear soon) it hadn't changed palette even there are
palette change chunks in that AVI.
Here is small patch to make it work (zero number of colors to change in
that chunk actually means to change ALL colors).
patch by (Kostya <cannonball>at<bw-team>dot<com>)

Originally committed as revision 3670 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avidec.c

@@ -512,6 +512,8 @@ resync:
 
             first = get_byte(pb);
             clr = get_byte(pb);
+	    if(!clr) /* all 256 colors used */
+		clr = 256;
             flags = get_le16(pb);
             p = 4;
             for (k = first; k < clr + first; k++) {