[BUGFIX] Add a missing PostgreSQL migration

A schema migration allowing NULL values for image dimensions was missing
for PostgreSQL.

TYPO3.Media/Migrations/Postgresql/Version20150701113247.php

@@ -0,0 +1,42 @@
+<?php
+namespace TYPO3\Flow\Persistence\Doctrine\Migrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration,
+	Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Allow NULL values for image dimensions
+ */
+class Version20150701113247 extends AbstractMigration {
+
+	/**
+	 * @param Schema $schema
+	 * @return void
+	 */
+	public function up(Schema $schema) {
+		$this->abortIf($this->connection->getDatabasePlatform()->getName() != "postgresql");
+
+		$this->addSql("ALTER TABLE typo3_media_domain_model_image ALTER width DROP NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_image ALTER height DROP NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_imagevariant ALTER width DROP NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_imagevariant ALTER height DROP NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_thumbnail ALTER width DROP NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_thumbnail ALTER height DROP NOT NULL");
+	}
+
+	/**
+	 * @param Schema $schema
+	 * @return void
+	 */
+	public function down(Schema $schema) {
+		$this->abortIf($this->connection->getDatabasePlatform()->getName() != "postgresql");
+
+		$this->addSql("CREATE SCHEMA public");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_image ALTER width SET NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_image ALTER height SET NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_imagevariant ALTER width SET NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_imagevariant ALTER height SET NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_thumbnail ALTER width SET NOT NULL");
+		$this->addSql("ALTER TABLE typo3_media_domain_model_thumbnail ALTER height SET NOT NULL");
+	}
+}