Page template tests don't recognise default templates

[richplane]

The hide_on and show_on settings wouldn't recognise "front-page.php" and "home.php" as page-template values, because the wp_postmeta just has these as 'default'.

So I've altered the two functions show_for_page_template and hide_for_page_tempate(), which perform the test against the given template slugs. In the case where the postmeta shows "default" they now test the current post against the front page and posts page from the site options.

[richplane]

If anyone else was waiting for this, here's a workaround: use

array(
    'show_on' => array(
        'id' => get_option('page_on_front')
    ),
    ....

...and 'page_for_posts' works for home.php.