Update linupx-scripts.sh

linupx-scripts.sh

@@ -654,7 +654,7 @@ INSTALL_WATCHTOWER() {
 		[Nn]) t=t;;
 		* )
 			echo
-			if [ ! "$(docker ps -q -f name=watchtower)" ]; then
+			if [ "$(docker ps -q -f name=watchtower)" ]; then
 				docker stop watchtower
 				docker rm watchtower
 			fi