fix BC layer of Form DependencyInjection extension

Author: xabbuh

Extension/DependencyInjection/DependencyInjectionExtension.php

@@ -41,6 +41,7 @@ public function __construct(ContainerInterface $typeContainer, array $typeExtens
             @trigger_error(sprintf('Passing four arguments to the %s::__construct() method is deprecated since Symfony 3.3 and will be disallowed in Symfony 4.0. The new constructor only accepts three arguments.', __CLASS__), E_USER_DEPRECATED);
             $this->guesserServiceIds = $guesserServiceIds;
             $this->typeServiceIds = $typeExtensionServices;
+            $typeExtensionServices = $guesserServices;
         }
 
         $this->typeContainer = $typeContainer;

Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php

@@ -81,7 +81,7 @@ public function testLegacyGetTypeExtensions()
                 throw new ServiceNotFoundException($id);
             });
 
-        $extension = new DependencyInjectionExtension($container, array('test' => array('extension1', 'extension2'), 'other' => array('extension3')), array(), array());
+        $extension = new DependencyInjectionExtension($container, array(), array('test' => array('extension1', 'extension2'), 'other' => array('extension3')), array());
 
         $this->assertTrue($extension->hasTypeExtensions('test'));
         $this->assertFalse($extension->hasTypeExtensions('unknown'));
@@ -102,7 +102,7 @@ public function testLegacyThrowExceptionForInvalidExtendedType()
             ->with('extension')
             ->willReturn($this->createFormTypeExtensionMock('unmatched'));
 
-        $extension = new DependencyInjectionExtension($container, array('test' => array('extension')), array(), array());
+        $extension = new DependencyInjectionExtension($container, array(), array('test' => array('extension')), array());
 
         $extension->getTypeExtensions('test');
     }