Initialize the start time in smdi_msg_wait. Somehow this code got lost in trunk.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@115847 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_smdi.c

@@ -420,6 +420,8 @@ static void *smdi_message_wait(struct ast_smdi_interface *iface, int timeout,
 	long diff = 0;
 	void *msg;
 
+	start = ast_tvnow();
+
 	while (diff < timeout) {
 		struct timespec ts = { 0, };
 		struct timeval tv;