bug #26657 [Workflow] Fixed default parameters (lyrixx)

This PR was merged into the 4.1-dev branch.

Discussion
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[Workflow] Fixed default parameters

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

fc303a8 [Workflow] Fixed default parameters

Author: lyrixx

DependencyInjection/FrameworkExtension.php

@@ -480,7 +480,7 @@ private function registerWorkflowConfiguration(array $config, ContainerBuilder $
             $type = $workflow['type'];
 
             // Process Metadata (workflow + places (transition is done in the "create transition" block))
-            $metadataStoreDefinition = new Definition(Workflow\Metadata\InMemoryMetadataStore::class, array(null, null, null));
+            $metadataStoreDefinition = new Definition(Workflow\Metadata\InMemoryMetadataStore::class, array(array(), array(), null));
             if ($workflow['metadata']) {
                 $metadataStoreDefinition->replaceArgument(0, $workflow['metadata']);
             }