forums/xls/forum-mso-en4-62141.xls failed to reload its own xls round-trip output. GetUnusedName compared candidate names case-sensitively, so it could emit two defined names differing only in case, and the import matches defined names without regard to case, so the two clash on reload. Signed-off-by: Caolán McNamara <caolan.mcnamara@collabora.com> Change-Id: Ifb199e9f4fcefe27476a56d3660c4c87b69ef90b Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/9185 Reviewed-by: Noel Grandin <noel.grandin@collabora.com> Tested-by: Jenkins CPCI <releng@collaboraoffice.com> (cherry picked from commit e5a3a0ffc32071c68923267b12cb4dd8f437ac44) Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209313 Tested-by: Jenkins Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>