Fix pdo_dblib and pdo_sqlsrv db_connect() and suppress warning messages for subdrivers that don't support certain option attributes
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index 6fb3dab..a54c1b9 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -126,7 +126,7 @@
 		// Connecting...
 		try
 		{
-			return new PDO($this->dsn, $this->username, $this->password, $this->options);
+			return @new PDO($this->dsn, $this->username, $this->password, $this->options);
 		}
 		catch (PDOException $e)
 		{
@@ -419,4 +419,4 @@
 }
 
 /* End of file pdo_driver.php */
-/* Location: ./system/database/drivers/pdo/pdo_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/pdo/pdo_driver.php */