[BUGFIX] Missing column in t3lib_TCEmain::getPreviousLocalizedRecordUid

Method t3lib_TCEmain::getPreviousLocalizedRecordUid() checks for the
"closest" localized record. For content elements it does this per
column, but actually fails because the "colPos" field is not among
the available fields. It must be added to the selection.

Change-Id: I2cd1ca612671aa8ff74599ccf7dd343ae6d86fa8
Fixes: #35260
Releases: 6.0, 4.7, 4.6, 4.5
Reviewed-on: http://review.typo3.org/9891
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Philipp Gampe
Reviewed-by: Wouter Wolters
Reviewed-by: Francois Suter
Tested-by: Francois Suter