Fixed undefined index notices

Fixed misspelling in the comment

Signed-off-by: Igor Prokopenkov <cmyk777@gmail.com>
Yes, this expiration evaluates differently, but it doesn't affects the
behavior
02.09.2014 16:43 пользователь "Hugues Peccatte" <notifications@github.com>
написал:

> In libraries/replication.inc.php:
>
> >   */
> > -if ($server_slave_multi_replication && $_REQUEST['master_connection']) {
> > +if ($server_slave_multi_replication && isset($_REQUEST['master_connection'])) {
>
> This test is really different from the previous one.
> Shouldn't we have the following?
> if ($server_slave_multi_replication &&
> isset($_REQUEST['master_connection']) && $_REQUEST['master_connection'])
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/phpmyadmin/phpmyadmin/pull/1351/files#r16987002>.
>