Update nodemgmt-scripts.sh

nodemgmt-scripts.sh

@@ -254,6 +254,7 @@ DELSITES(){
 	DIVIDER true
 	sid=1
 	for siteconf in /etc/nginx/sites-available/* ; do
+		[ -e "$siteconf" ] || continue
 		IFS='/'; site_conf=(${siteconf}); unset IFS
 		SITES[${sid}]=${site_conf[4]}
 		sid=`expr $sid + 1`