[FrameworkBundle] Fix for getting the file link format fallback to XDebug configuration

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php

@@ -31,7 +31,7 @@ class Configuration
                 ->scalarNode('document_root')->end()
                 ->scalarNode('error_handler')->end()
                 ->scalarNode('exception_controller')->defaultValue('Symfony\\Bundle\\FrameworkBundle\\Controller\\ExceptionController::showAction')->end()
-                ->scalarNode('ide')->end()
+                ->scalarNode('ide')->defaultNull()->end()
                 ->booleanNode('test')->end()
             ->end()
         ;

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -83,15 +83,11 @@ class FrameworkExtension extends Extension
 
         $container->getDefinition('exception_listener')->setArgument(0, $config['exception_controller']);
 
-        $pattern = '';
-        if (isset($config['ide'])) {
-            $patterns = array(
-                'textmate' => 'txmt://open?url=file://%%f&line=%%l',
-                'macvim'   => 'mvim://open?url=file://%%f&line=%%l',
-            );
-            $pattern = isset($patterns[$config['ide']]) ? $patterns[$config['ide']] : $config['ide'];
-        }
-        $container->setParameter('debug.file_link_format', $pattern);
+        $links = array(
+            'textmate' => 'txmt://open?url=file://%%f&line=%%l',
+            'macvim'   => 'mvim://open?url=file://%%f&line=%%l',
+        );
+        $container->setParameter('debug.file_link_format', isset($links[$config['ide']]) ? $links[$config['ide']] : $config['ide']);
 
         if (!empty($config['test'])) {
             $loader->load('test.xml');