100l, add missing enum type, fix compilation

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@16495 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/mxf.h

@@ -41,6 +41,7 @@ enum MXFMetadataSetType {
     Identification,
     ContentStorage,
     SubDescriptor,
+    IndexTableSegment,
     TypeBottom,// add metadata type before this
 };