Merged revisions 175591 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

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  r175591 | mmichelson | 2009-02-13 13:49:38 -0600 (Fri, 13 Feb 2009) | 22 lines
  
  Merged revisions 175590 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
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    r175590 | mmichelson | 2009-02-13 13:47:48 -0600 (Fri, 13 Feb 2009) | 16 lines
    
    Fix a potential crash situation when using IMAP voicemail
    
    If calling into VoiceMailMain when using IMAP storage, it was
    possible to crash Asterisk by hanging up the phone when prompted
    for a voicemail mailbox. This patch fixes the issue.
    
    While it may appear that this patch is superficial, it allows code
    execution to continue to the failure case just below the IMAP_STORAGE
    code block where this patch has been applied
    
    (closes issue #14473)
    Reported by: dwpaul
    Patches:
          voicemail_imap_crash_no_mailbox.patch uploaded by dwpaul (license 689)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@175593 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -8792,7 +8792,8 @@ static int vm_execmain(struct ast_channel *chan, void *data)
 #ifdef IMAP_STORAGE
 	vms.interactive = 1;
 	vms.updated = 1;
-	ast_copy_string(vms.context, vmu->context, sizeof(vms.context));
+	if (vmu)
+		ast_copy_string(vms.context, vmu->context, sizeof(vms.context));
 	vmstate_insert(&vms);
 	init_vm_state(&vms);
 #endif