Fixed options unset service locator bug.

module/VuFind/src/VuFind/Search/Base/Options.php

@@ -559,6 +559,17 @@ abstract class Options implements ServiceLocatorAwareInterface
         return $this;
     }
 
+    /**
+     * Unset the service locator.
+     *
+     * @return Params
+     */
+    public function unsetServiceLocator()
+    {
+        $this->serviceLocator = null;
+        return $this;
+    }
+
     /**
      * Get the service locator.
      *

module/VuFind/src/VuFind/Search/Base/Params.php

@@ -1511,7 +1511,7 @@ class Params implements ServiceLocatorAwareInterface
         $this->serviceLocator = null;
         $options = $this->getOptions();
         if (method_exists($options, 'unsetServiceLocator')) {
-            $params->unsetServiceLocator();
+            $options->unsetServiceLocator();
         }
         return $this;
     }