Merge pull request #268 from franzliedke/patch-1

Only extend database when it is actually resolved.

src/Jenssegers/Mongodb/MongodbServiceProvider.php

@@ -25,10 +25,12 @@ class MongodbServiceProvider extends ServiceProvider {
     public function register()
     {
         // Add a mongodb extension to the original database manager
-        $this->app['db']->extend('mongodb', function($config)
+        $this->app->resolving('db', function($db) {
+            $db->extend('mongodb', function($config)
             {
                 return new Connection($config);
             });
+        });
     }
 
 }