Refactor: Prevent to throw ModelNotFoundException error when non acti…

…ve object is set for privacyPolicyObjType model

src/Charcoal/CookieConsent/Model/Structure/Link.php

@@ -150,7 +150,7 @@ public function getHref()
                     return $this->getUrl();
             }
         } catch (ModelNotFoundException $e) {
-            return '';
+            // do nothing
         }
 
         return null;