Fixed a crash in the SVDRP command CLRE in case a non-existing channel number is given

CONTRIBUTORS

@@ -2938,6 +2938,8 @@ Manuel Reimer <Manuel.Reimer@gmx.de>
  for reporting a bug in moving channels between number groups in SVDRP's MOVC command
  for fixing compatibility with current versions of glibc
  for suggesting to make the SVDRP command DELC accept a channel id
+ for reporting a crash in the SVDRP command CLRE in case a non-existing channel
+ number is given
 
 Rene van den Braken <rene@vandenbraken.name>
  for reporting a bug in writing the PCR pid into the PMT in

HISTORY

@@ -9575,3 +9575,5 @@ Video Disk Recorder Revision History
 - Somewhere down the road the 'x' bit of Doxyfile.filter got lost, so the
   Makefile now makes sure it is set before calling doxygen.
 - Using strgetlast() in more places.
+- Fixed a crash in the SVDRP command CLRE in case a non-existing channel number is
+  given (reported by Manuel Reimer).

svdrp.c

@@ -10,7 +10,7 @@
  * and interact with the Video Disk Recorder - or write a full featured
  * graphical interface that sits on top of an SVDRP connection.
  *
- * $Id: svdrp.c 5.1 2020/12/26 15:49:01 kls Exp $
+ * $Id: svdrp.c 5.2 2021/01/01 21:23:00 kls Exp $
  */
 
 #include "svdrp.h"
@@ -1301,8 +1301,10 @@ void cSVDRPServer::CmdCLRE(const char *Option)
      tChannelID ChannelID = tChannelID::InvalidID;
      if (isnumber(Option)) {
         int o = strtol(Option, NULL, 10);
-        if (o >= 1 && o <= cChannels::MaxNumber())
-           ChannelID = Channels->GetByNumber(o)->GetChannelID();
+        if (o >= 1 && o <= cChannels::MaxNumber()) {
+           if (const cChannel *Channel = Channels->GetByNumber(o))
+              ChannelID = Channel->GetChannelID();
+           }
         }
      else {
         ChannelID = tChannelID::FromString(Option);