silc_stack_free can now be called with NULL stack

diff --git a/lib/silcutil/silcstack.c b/lib/silcutil/silcstack.c
index fabef8ec7dbddc953b8ba2ff45cec6f7f4aafeca..6107cf047598a912e888fa55aadc59850b4f2be5 100644 (file)
--- a/lib/silcutil/silcstack.c
+++ b/lib/silcutil/silcstack.c
@@ -4,7 +4,7 @@
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 2003 - 2006 Pekka Riikonen
+  Copyright (C) 2003 - 2008 Pekka Riikonen
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -66,6 +66,9 @@ void silc_stack_free(SilcStack stack)
 {
   int i;
 
+  if (!stack)
+    return;
+
   silc_free(stack->frames);
   for (i = 0; i < SILC_STACK_BLOCK_NUM; i++)
     silc_free(stack->stack[i]);