Update certs.inc

inc/certs.inc

@@ -300,7 +300,7 @@ LISTCERTS(){
 				[ "${SEARCH}" != "0" ] && LISTCERTS -edit -search ${SEARCH} || LISTCERTS -edit
 				exit 0
 									
-			elif [ "${CERTLIST[${certid}]}" != "" ]; then
+			elif [ "${certid}" != "" ] && [ "${CERTLIST[${certid}]}" != "" ]; then
 				cert=${CERTLIST[${certid}]}
 				certdir=${NM_CERTPATH}/live/${cert}
 				SUBJECT=$(${NCMD} openssl x509 -in ${certdir}/cert.pem -noout -subject|grep -oP '(?<=CN = )[^,]+'|sort -uV)