From 404124eca463c5ba8ce76b1b3ca4e9454eeee7d4 Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Sun, 31 Jul 2011 13:23:31 +0200
Subject: The isnumber() function now checks the given pointer for NULL

---
 CONTRIBUTORS | 3 +++
 HISTORY      | 4 +++-
 tools.c      | 4 ++--
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 47782f81..871f6bf9 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -2727,3 +2727,6 @@ Johan Andersson <jna@jna.pp.se>
 Dave Pickles <dave@pickles.me.uk>
  for adding support for "content identifier descriptor" and "default authority
  descriptor" to 'libsi'
+
+Holger Dengler <holger.dengler@gmx.de>
+ for making the isnumber() function check the given pointer for NULL
diff --git a/HISTORY b/HISTORY
index 46a61bb8..f5780e8e 100644
--- a/HISTORY
+++ b/HISTORY
@@ -6650,6 +6650,8 @@ Video Disk Recorder Revision History
 - Added support for "content identifier descriptor" and "default authority descriptor"
   to 'libsi' (thanks to Dave Pickles).
 
-2011-06-21: Version 1.7.20
+2011-07-31: Version 1.7.20
 
 - Added some missing 'const' to tChannelID (reported by Sundararaj Reel).
+- The isnumber() function now checks the given pointer for NULL (thanks to Holger
+  Dengler).
diff --git a/tools.c b/tools.c
index 6a98bf69..e0b11633 100644
--- a/tools.c
+++ b/tools.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.c 2.14 2011/04/29 14:51:14 kls Exp $
+ * $Id: tools.c 2.15 2011/07/31 13:19:28 kls Exp $
  */
 
 #include "tools.h"
@@ -261,7 +261,7 @@ int numdigits(int n)
 
 bool isnumber(const char *s)
 {
-  if (!*s)
+  if (!s || !*s)
      return false;
   do {
      if (!isdigit(*s))
-- 
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