double slash in search form

Hi,
I found a bug in the first line of searchform.php:
.. home_url( '/' ); ?>/" ..
It usually is not a problem because the resulted url is something like “http://example.com//”.

But I use the Relative URL plugin. My resulted action value for the search form is “//”. In this case computer says NO. 😀

Can you fix this bug? Thank you!