avformat/matroska: clean the structure formatting

Always use a comma at the end, order elements by value.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/matroska.h

@@ -286,13 +286,13 @@ typedef enum {
 typedef enum {
     MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED = 0,
     MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED   = 1,
-    MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE  = 2
+    MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE  = 2,
 } MatroskaVideoInterlaceFlag;
 
 typedef enum {
     MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE  = 0,
-    MATROSKA_VIDEO_FIELDORDER_UNDETERMINED = 2,
     MATROSKA_VIDEO_FIELDORDER_TT           = 1,
+    MATROSKA_VIDEO_FIELDORDER_UNDETERMINED = 2,
     MATROSKA_VIDEO_FIELDORDER_BB           = 6,
     MATROSKA_VIDEO_FIELDORDER_TB           = 9,
     MATROSKA_VIDEO_FIELDORDER_BT           = 14,