Defined the aDicLangInUse within the #ifdef block where it is used.

Change-Id: I872cf178a803c3210898f7f317211a8d3a2d368e
Reviewed-on: https://gerrit.libreoffice.org/782Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>