Fixed a possible crash when canceling VDR while displaying subtitles, and the primary device is no longer available

HISTORY

@@ -6855,3 +6855,5 @@ Video Disk Recorder Revision History
   faster in case the file is very large (suggested by Helmut Auer).
 - Fixed selecting the primary device for receiving the live viewing channel in
   case it is bonded with an other device and has no receiver attached to it.
+- Fixed a possible crash when canceling VDR while displaying subtitles, and the
+  primary device is no longer available.

device.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: device.c 2.46 2012/01/18 10:43:00 kls Exp $
+ * $Id: device.c 2.47 2012/02/12 15:44:06 kls Exp $
  */
 
 #include "device.h"
@@ -41,6 +41,7 @@ cLiveSubtitle::~cLiveSubtitle()
 
 void cLiveSubtitle::Receive(uchar *Data, int Length)
 {
+  if (cDevice::PrimaryDevice())
      cDevice::PrimaryDevice()->PlayTs(Data, Length);
 }
 

dvbdevice.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbdevice.c 2.60 2012/02/12 12:38:49 kls Exp $
+ * $Id: dvbdevice.c 2.61 2012/02/12 15:45:10 kls Exp $
  */
 
 #include "dvbdevice.h"
@@ -1008,6 +1008,7 @@ cDvbDevice::cDvbDevice(int Adapter, int Frontend)
   numModulations = 0;
   bondedDevice = NULL;
   needsDetachBondedReceivers = false;
+  tsBuffer = NULL;
 
   // Devices that are present on all card types: