Bug 12956: Users are not linked to a fund

When creating a fund, if you add some users, they are not linked to the
fund.
Note that it works if you link them when editing the fund.

Test plan:
- Try to link users to a fund on creating it.
- On editing, you should see the linked user list.

Signed-off-by: Nick Clemens <nick@quecheelibrary.org>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

admin/aqbudgets.pl

@@ -251,7 +251,7 @@ if ($op eq 'add_form') {
             $template->param(error_not_authorised_to_modify => 1);
         }
     } else {
-        AddBudget( $budget_hash );
+        $budget_hash->{budget_id} = AddBudget( $budget_hash );
         ModBudgetUsers($budget_hash->{budget_id}, @budgetusersid);
     }
     $op = 'list';