Fixed a crash in case there is no DVB hardware present

CONTRIBUTORS

@@ -672,6 +672,7 @@ Sascha Volkenandt <sascha@akv-soft.de>
  for making the 'epg.data' file being read after all plugins have been started
  for reporting a problem with cReceivers that use a ring buffer and didn't immediately
  return from their Receive() function if the buffer runs full
+ for reporting a crash in case there is no DVB hardware present
 
 Malcolm Caldwell <malcolm.caldwell@ntu.edu.au>
  for modifying LOF handling to allow for C-band reception

HISTORY

@@ -2550,3 +2550,5 @@ Video Disk Recorder Revision History
   control if and how channels will be automatically updated (see MANUAL).
   This has already been part of the 'autopid' patch by Andreas Schultz and has
   now been adopted.
+- Fixed a crash in case there is no DVB hardware present (thanks to Sascha
+  Volkenandt for reporting this one).

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 1.76 2004/01/04 12:28:00 kls Exp $
+ * $Id: dvbdevice.c 1.77 2004/01/05 12:24:18 kls Exp $
  */
 
 #include "dvbdevice.h"
@@ -772,7 +772,7 @@ bool cDvbDevice::SetChannelDevice(const cChannel *Channel, bool LiveView)
 
 bool cDvbDevice::HasLock(void)
 {
-  return dvbTuner->Locked();
+  return dvbTuner ? dvbTuner->Locked() : false;
 }
 
 void cDvbDevice::SetVolumeDevice(int Volume)