Change a case of CODEC_TYPE_ into AVMEDIA_TYPE_

This was accidentally overwritten in the recent merge of the theora/vorbis codepaths

Originally committed as revision 22774 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtpdec_xiph.c

@@ -390,7 +390,7 @@ RTPDynamicProtocolHandler ff_theora_dynamic_handler = {
 
 RTPDynamicProtocolHandler ff_vorbis_dynamic_handler = {
     .enc_name         = "vorbis",
-    .codec_type       = CODEC_TYPE_AUDIO,
+    .codec_type       = AVMEDIA_TYPE_AUDIO,
     .codec_id         = CODEC_ID_VORBIS,
     .parse_sdp_a_line = xiph_parse_sdp_line,
     .open             = xiph_new_context,