Bug 30098: Only redirect from patron search if single result is on first page

Bug 30098: Only redirect from patron search if single result is on first page

This patch simply adds a check that we are oin the first page (starting at result 0)
before redirecting to a isngle patron

To test:
1 - Perform a patron search that returns 41 results, on Koha testing docker, 'a' works
2 - Go to second page of results, works
3 - Go to third page of results, redirected to the patron
4 - Apply patch
5 - Repeat search and paging
6 - On third page you remian in results and are not redirected to patron

Signed-off-by: Emmanuel Bétemps <e.betemps@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>