[BUGFIX] Raise index_rel.first to int(11)

The index_rel.first database table of indexed_search
is used to store the number of occurrences of words,
which could be more in bigger indices.

Resolves: #75406
Releases: master, 7.6
Change-Id: I05b0fc1e2f74e2eb09b3af9d643b3145c0d6db6e
Reviewed-on: https://review.typo3.org/47507


Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>