Fix uninitialized variable.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@212430 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -5882,7 +5882,7 @@ static void *ss_thread(void *data)
 	int counter;
 	int samples = 0;
 	struct ast_smdi_md_message *smdi_msg = NULL;
-	int flags;
+	int flags = 0;
 	int i;
 	int timeout;
 	int getforward = 0;