Bug 24345: Fix process of suggesting purchase of existing title for non-logged-in...

Bug 24345: Fix process of suggesting purchase of existing title for non-logged-in users

The 'op' parameter is removed from the CGI object ($input) before
get_template_and_user is called. When the user is redirected to the
login form (from checkauth, called from get_template_and_user), the
op is lost.

Moving down the deletion fixes the problem.

Test plan:
Logout at the OPAC
Go the detail page of a bibliographic record
Click the "Suggest for purchase" link
Fill the login form
=> Without this patch you will see your suggestion list
=> With this patch applied the new suggestion form will be displayed,
prefilled with the biblio's info

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>