Fix possible lack of initialization of useadsi

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@10464 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -4945,7 +4945,7 @@ static int vm_authenticate(struct ast_channel *chan, char *mailbox, int mailbox_
 			   struct ast_vm_user *res_vmu, const char *context, const char *prefix,
 			   int skipuser, int maxlogins, int silent)
 {
-	int useadsi, valid=0, logretries=0;
+	int useadsi=0, valid=0, logretries=0;
 	char password[AST_MAX_EXTENSION]="", *passptr;
 	struct ast_vm_user vmus, *vmu = NULL;