fix(Widgets/UsersList): Ensure the $photoExtensions variable is passe…

…d to the user callback so it is within scope

app/Widgets/UserList/UserList.php

@@ -150,7 +150,7 @@ public function run()
 			->orderBy($a . '.' . (string)$this->params->get('order', 'name'), (string)$this->params->get('order_dir', 'asc'))
 			->get();
 
-		$users->each(function($user, $key) use ($segments)
+		$users->each(function($user, $key) use ($segments, $photoExtensions)
 		{
 			//event($e = new UserBeforeDisplay($user));