skip offset calculation if pagination is disabled

lib/NGCP/Panel/Controller/Root.pm

@@ -134,10 +134,9 @@ sub ajax_process_resultset :Private {
     }
     
     #Pagination
-    if (defined($iDisplayStart) && $iDisplayLength) {
+    # $iDisplayLength will be -1 if bPaginate is false
-        $rs = $rs->search(
+    if (defined $iDisplayStart && $iDisplayLength && $iDisplayLength > 0) {
-            undef,
+        $rs = $rs->search(undef, {
-            {
             offset => $iDisplayStart,
             rows   => $iDisplayLength,
         });