Bug 28013: (follow-up) Correct and update call to CanItemBeReserved

Bug 28013: (follow-up) Correct and update call to CanItemBeReserved

The current call checks for truth against a returned hash, we need
to check the 'status' value

Signed-off-by: Joonas Kylmälä <joonas.kylmala@helsinki.fi>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit ded05deb102de13de95c5e0f76bfaf79075423cf)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit e26eb6df85c416394633b89d2837697e71d744af)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>