we really shouldnt use M$* as default codec -> use MPEG4 as default

Originally committed as revision 1785 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avienc.c

@@ -560,7 +560,7 @@ static AVOutputFormat avi_oformat = {
     "avi",
     sizeof(AVIContext),
     CODEC_ID_MP2,
-    CODEC_ID_MSMPEG4V3,
+    CODEC_ID_MPEG4,
     avi_write_header,
     avi_write_packet,
     avi_write_trailer,