refs #17876 [master] prevent notices caused by method referenced return value in finc bootstrapper

module/finc/src/finc/Bootstrapper.php

@@ -74,8 +74,9 @@ class Bootstrapper extends \VuFind\Bootstrapper
                 return;
             }
 
+            $exceptionArray = explode('\\', get_class($e->getParam('exception')));
             $exceptionName = end(
-                explode('\\', get_class($e->getParam('exception')))
+                $exceptionArray
             );
 
             $resolver = $e->getApplication()