canceled voicemail emails corrupt wav (bug 2957)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4382 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -1523,7 +1523,8 @@ static int leave_voicemail(struct ast_channel *chan, char *ext, int silent, int
 						free_user(recip);
 					}
 				}
-				notify_new_message(chan, vmu, msgnum, duration, fmt, chan->callerid);
+				if (ast_fileexists(fn, NULL, NULL))	
+					notify_new_message(chan, vmu, msgnum, duration, fmt, chan->callerid);
 			} else {
 				res = ast_streamfile(chan, "vm-mailboxfull", chan->language);
 				if (!res)