CC-3036: Deleted Show instances reappear

-done.

install_minimal/DoctrineMigrations/Version20111114222927.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration,
+    Doctrine\DBAL\Schema\Schema;
+
+class Version20111114222927 extends AbstractMigration
+{
+    public function up(Schema $schema)
+    {
+        $cc_show_instances = $schema->getTable('cc_show_instances');
+        $cc_show_instances->addColumn('deleted_instance', 'boolean', array('notnull' => true, 'default'=> '0'));
+    }
+
+    public function down(Schema $schema)
+    {
+
+    }
+}