gracefully handle missing hinclude renderer

Author: xabbuh

src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php

@@ -65,10 +65,7 @@ public function process(ContainerBuilder $container)
             $container->getDefinition('twig.extension.httpkernel')->addTag('twig.extension');
 
             // inject Twig in the hinclude service if Twig is the only registered templating engine
-            if (
-                !$container->hasParameter('templating.engines')
-                || array('twig') == $container->getParameter('templating.engines')
-            ) {
+            if ((!$container->hasParameter('templating.engines') || array('twig') == $container->getParameter('templating.engines')) && $container->hasDefinition('fragment.renderer.hinclude')) {
                 $container->getDefinition('fragment.renderer.hinclude')
                     ->addTag('kernel.fragment_renderer', array('alias' => 'hinclude'))
                     ->replaceArgument(0, new Reference('twig'))