Bug 9946 - opac-topissues with no time limit

Bug 9946 - opac-topissues with no time limit

When in opac-topissues using filter "of the last:" with value "No limit", the result shows the caption : "The 10 most checked-out in the past 999 months".

This patch corrects a typo error : $timeLimit was used instead of $timeLimitFinite

Test plan :
- Go to OPAC most popular
- Select "No limit" in last filter and submit
=> Check that result displays caption : "The 10 most checked-out of all time"
- Come back
- Select "6 months" in last filter and submit
=> Check that result displays caption : "The 10 most checked-out in the past 6 months"

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script.
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>