Fixed inconsistent return types
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index a0803f1..bbe65b4 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -822,7 +822,7 @@
 	{
 		if ( ! $this->trans_enabled)
 		{
-			return FALSE;
+			return;
 		}
 
 		// When transactions are nested we only begin/commit/rollback the outermost ones
diff --git a/system/database/DB_utility.php b/system/database/DB_utility.php
index 774d515..ecfda52 100644
--- a/system/database/DB_utility.php
+++ b/system/database/DB_utility.php
@@ -316,7 +316,7 @@
 	 * Database Backup
 	 *
 	 * @param	array	$params
-	 * @return	void
+	 * @return	mixed
 	 */
 	public function backup($params = array())
 	{