Handle when controls is not defined, like in WebSite monitors

web/skins/classic/views/js/monitor.js.php

@@ -8,6 +8,7 @@ if (ZM_OPT_CONTROL and canView('Control')) {
 var controlOptions = new Object();
 <?php
   global $controls;
+  if ($controls) {
     foreach ($controls as $control) {
       echo '
 controlOptions['.$control->Id().'] = new Array();
@@ -17,6 +18,7 @@ controlOptions['.$control->Id().'][0] = '.
         echo 'controlOptions['. $control->Id().']['.$i.'] = \''.translate('Preset').' '.$i .'\';'.PHP_EOL;
       }
     } # end foreach row
+  }
 } # end if ZM_OPT_CONTROL
 ?>