Set data version

migrate-1.2.0.patch

Index: lib/task/migrate/MigrateTask.class.php
===================================================================
--- lib/task/migrate/MigrateTask.class.php	(revision 10579)
+++ lib/task/migrate/MigrateTask.class.php	(working copy)
@@ -204,6 +204,8 @@
     $dir = dirname($originalFileName);
     $migratedFileName = $dir.DIRECTORY_SEPARATOR.$migratedFileName;
 
+    $this->setDataVersion();
+
     $yamlDumper = new sfYamlDumper();
     $yamlData = sfYaml::dump($this->data, 3);