Bug 18150 - CanItemBeReserved doesn't work with (IndependentBranches AND ! canreserve...

Bug 18150 - CanItemBeReserved doesn't work with (IndependentBranches AND ! canreservefromotherbranches)

The variable $item used to be a hash, but at the end of the function,
it's a Koha object. As $item->{homebranch} doesn't yield anything and
should be $item->homebranch. It prevents people using different
branches without holds between branches from placing a hold on an item
they should be able to place hold on.

Test plan:

1. Before patch

  a. with IndependantBranches off
  b. try to place hold on an item you should be able to place hold on
  c. it should work
  d. put IndependantBranches on and canreservefromotherbranches off
  e. shouldn't work

2. after patches redo steps from (1) and everything should be working
fine.

Signed-off-by: Christopher Brannon <cbrannon@cdalibrary.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Note: Item is fetched twice, it's not necessary. But out of the scope of
this patch.

Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>