Update mm-scripts.sh

mm-scripts.sh

@@ -1399,7 +1399,7 @@ USAGE(){
 	echo
 	echo
 	srvcsavail="$(join_by , ${MM_SERVICES})"
-	if [ "${MM_SERVICES}" != "" ]; then
+	if [ "${SERVICESCHECK}" != "" ]; then
 		srvcscheck=${SERVICESCHECK//,/, }
 		srvcscheck=${srvcscheck/snap.tautulli.tautulli/tautulli}
 		srvcscheck=${srvcscheck/snap.overseerr.daemon/overseerr}