Add WebM to the Matroska demuxer name.

Originally committed as revision 24639 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avformat.h

@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 77
+#define LIBAVFORMAT_VERSION_MINOR 78
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

libavformat/matroskadec.c

@@ -1899,8 +1899,8 @@ static int matroska_read_close(AVFormatContext *s)
 }
 
 AVInputFormat matroska_demuxer = {
-    "matroska",
-    NULL_IF_CONFIG_SMALL("Matroska file format"),
+    "matroska,webm",
+    NULL_IF_CONFIG_SMALL("Matroska/WebM file format"),
     sizeof(MatroskaDemuxContext),
     matroska_probe,
     matroska_read_header,