Update services.inc

inc/services.inc

@@ -271,7 +271,7 @@ SERVICE(){
 			echo
 		fi
 		
-		if [ "${NTS}" == "" ]; then
+		if [[ "$(declare -p NTS)" =~ "declare -a" ]]; then
 			for NTYPE in "${NTS[@]}"; do
 				var1=${NTYPE}_SERVICES_CHECK[@]
 				# if [[ "${!var1}" = *"${1}"* ]]; then