Bug 19118 - Due to wrong variable name passed vendor name is not coming in browser...

Bug 19118 - Due to wrong variable name passed vendor name is not coming in browser title bar

Test

1. Hit the page /cgi-bin/koha/acqui/supplier.pl?booksellerid=xx
   xx is a booksellerid
2. Apply the patch and reload the page.
3. You can see vendor name in browser title bar.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit ea886885d0efa0200cfa166453a4495692afc4d4)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>