gitweb: incorrect search form layout when $site_header is in use

Hi, please see http://bugs.debian.org/408768:

When $site_header is in use and some vertical space is added to the top
of the web page, the search layout with CSS
div.search {
        position: absolute;
        top: 56px;
        right: 12px
}
is incorrect and ends up to cover the git logo.

Correcting this by using "position: inherit;" is complicated and may
involve some code reorganization between
   git_header_html();   and    git_print_page_nav(...);

Please forward this upstream for correction.

Thanks, Gerrit.