Fixed bugs in hasHoldings().

module/VuFind/src/VuFind/ILS/Driver/NoILS.php

@@ -267,8 +267,11 @@ class NoILS extends AbstractBase implements TranslatorAwareInterface
     public function hasHoldings($id)
     {
         $useHoldings = isset($this->config['settings']['useHoldings'])
-            ? $this->config['settings']['useHoldings'] : 'none';
-        return $useHoldings == 'none';
+            ? $this->config['settings']['useHoldings'] : '';
+
+        // "none" will be processed differently in the config depending
+        // on whether it's in or out of quotes; handle both cases.
+        return $useHoldings != 'none' && !empty($useHoldings);
     }