Remove (most of) error suppression from database drivers (issue #3036)
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index 58f2e34..ec983d5 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -556,7 +556,7 @@
 	 */
 	protected function _close()
 	{
-		@sqlsrv_close($this->conn_id);
+		sqlsrv_close($this->conn_id);
 	}
 
 }