Update system/database/drivers/sqlsrv/sqlsrv_driver.php

Connection error if database name contains space-characters. 
Use of MSSQL brackets => 
'USE [Database Name]' 
instead of 
'USE Database Name'
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index 7346ad2..a502485 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -135,7 +135,7 @@
 			$database = $this->database;
 		}
 
-		if ($this->_execute('USE '.$database))
+		if ($this->_execute('USE ['.$database.']'))
 		{
 			$this->database = $database;
 			return TRUE;