Fix building with libdvdnav 4.2.1

Author: astiob

configure

@@ -5165,7 +5165,7 @@ if test "$_dvdnav" = auto ; then
     res_comment="internal"
   else
     _dvdnav=no
-    pkg_config_add dvdnav && _dvdnav=yes
+    pkg_config_add "dvdnav >= 4.2.1" && _dvdnav=yes
   fi
 fi
 if test "$_dvdnav" = yes ; then

stream/stream_dvdnav.c

@@ -715,13 +715,13 @@ static int mp_dvdnav_get_aid_from_format (stream_t *stream, int index, uint8_t l
 
   format = dvdnav_audio_stream_format(priv->dvdnav, lg);
   switch(format) {
-  case DVDNAV_FORMAT_AC3:
+  case DVD_AUDIO_FORMAT_AC3:
     return index + 128;
-  case DVDNAV_FORMAT_DTS:
+  case DVD_AUDIO_FORMAT_DTS:
     return index + 136;
-  case DVDNAV_FORMAT_LPCM:
+  case DVD_AUDIO_FORMAT_LPCM:
     return index + 160;
-  case DVDNAV_FORMAT_MPEGAUDIO:
+  case DVD_AUDIO_FORMAT_MPEG2_EXT:
     return index;
   default:
     return -1;