added a null pointer check in alarm

diff --git a/mngsrc/alarms.c b/mngsrc/alarms.c
index 5fb010b..6ce5b38 100644 (file)
--- a/mngsrc/alarms.c
+++ b/mngsrc/alarms.c
@@ -265,8 +265,8 @@ int delAlarmListItem(Alarm *pDel){
   Alarm *p;
   Alarm *pPrev;
 
-  /* if the item is none, no proc */
-  if(pDel==NULL){
+  /* if item or list is none, no proc */
+  if(pDel==NULL || pAlarmTop==NULL){
     /* no proc */
   }