Renames some variable to ease the understanding of what does what

Change-Id: Idd84eb89b7c1fb56dd43d66edfbbeafedc319095
Reviewed-on: https://gerrit.libreoffice.org/16360Reviewed-by: Philippe Jung <phil.jung@free.fr>
Tested-by: Philippe Jung <phil.jung@free.fr>
(cherry picked from commit 79be3a5e)
Reviewed-on: https://gerrit.libreoffice.org/16363Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>