Fix voicemail crash (bug #4800)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6261 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index e91eb3cf8e34e2ec425aa233c2f9560a16e3f34f..6ca24af711569ea0578082c7c02c0cf3b6180bcf 100755 (executable)
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -3575,8 +3575,10 @@ static int close_mailbox(struct vm_state *vms, struct ast_vm_user *vmu)
        ast_unlock_path(vms->curdir);
 
 done:
-       memset(vms->deleted, 0, sizeof(vms->deleted)); 
-       memset(vms->heard, 0, sizeof(vms->heard)); 
+       if (vms->deleted)
+               memset(vms->deleted, 0, sizeof(vms->deleted)); 
+       if (vms->heard)
+               memset(vms->heard, 0, sizeof(vms->heard)); 
 
        return 0;
 }