Limited the Goto() call in cDvbPlayer::SetAudioTrack() to the main thread

HISTORY

@@ -7689,7 +7689,7 @@ Video Disk Recorder Revision History
 - When sorting recordings by name, folders are now always at the top of the list.
 - Updated the Russian OSD texts (thanks to Oleg Roitburd).
 
-2013-03-07: Version 1.7.40
+2013-03-08: Version 1.7.40
 
 - The "Recording info" page of the skins that come with VDR now displays the name of
   the channel (if available) from which this recording was taken.
@@ -7722,3 +7722,5 @@ Video Disk Recorder Revision History
   With this VDR now supports "multi streaming" on DVB-S2 and DVB-T2 transponders.
 - Fixed a possible deadlock when changing the audio track while replaying a recording.
 - Fixed resuming replay of PES recordings (reported by Oliver Endriss).
+- Limited the Goto() call in cDvbPlayer::SetAudioTrack() to the main thread, in order
+  to avoid a crash when the track is automatically set from the player thread.

dvbplayer.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbplayer.c 2.34 2013/03/07 14:38:26 kls Exp $
+ * $Id: dvbplayer.c 2.35 2013/03/08 13:44:19 kls Exp $
  */
 
 #include "dvbplayer.h"
@@ -817,6 +817,8 @@ void cDvbPlayer::Goto(int Index, bool Still)
 
 void cDvbPlayer::SetAudioTrack(eTrackType Type, const tTrackId *TrackId)
 {
+  if (!cThread::IsMainThread())
+     return; // only do this upon user interaction
   if (playMode == pmPlay) {
      if (!ptsIndex.IsEmpty()) {
         int Current, Total;