[FEATURE] Enable stdWrap for select.where

stdWrap was supported at select.andWhere already.

Be careful not to use GPvar with this feature without
securing it (e.g. with stdWrap.intval)

Change-Id: I22c0e2c1c49fdd44ab67b823043a2e07f304e8c8
Resolves: #17881
Reviewed-on: http://review.typo3.org/3337
Reviewed-by: Susanne Moog
Tested-by: Susanne Moog