Bug 9362: fix query that finds upcoming due loans

Bug 9362: fix query that finds upcoming due loans

C4:Circulation:GetUpcomingDueIssues is used in the advance_notices.pl
script.  This patch corrects an error in its handling of the maxdays
parameter that resulted in it picking up *all* upcoming due loans and
recently overdue loans.

Test plan :
- Create an issue with a date due in the paste
- Create an issue with a date due in two days
- Launch advance notices with due date in max 2 days : perl misc/cronjobs/advance_notices.pl -c -n -v -m=2
=> You get a warn "found 0 issues"
- Launch advance notices with due date in max 3 days : perl misc/cronjobs/advance_notices.pl -c -n -v -m=3
=> You get a warn "found 1 issues"

Signed-off-by: Mathieu Saby <mathieu.saby@univ-rennes2.fr>
I did the following test :

- 1 book to check in 2 days
- 2 books to check in in the past

before applying the patch :

$perl ../misc/cronjobs/advance_notices.pl -c -n -v -m=2
getting upcoming due issues at ../misc/cronjobs/advance_notices.pl line 203.
found 1 issues at ../misc/cronjobs/advance_notices.pl line 205.

I changed the value of "-m" : 0, 1, 2, 3, 4
=> always 1 issue found (the book to check in in 2 days)

after applying the patch :

$perl ../misc/cronjobs/advance_notices.pl -c -n -v -m=2
found 0 issues
for m = 0, 1, 2 => 0 issues

$perl ../misc/cronjobs/advance_notices.pl -c -n -v -m=3
found 1 issues
for m = 3,4,5 => 1 issues (the book to check in in 2 days)

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passes koha-qa.pl, works as advertised.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>