crashtest: sep should be curSep

Change-Id: Ic83165ee4af86d0ed0bc77505aae8f50cfc1471a
(cherry picked from commit 3669242804e59c4e4d9f3db3d4e4534e223cbd78)
Reviewed-on: https://gerrit.libreoffice.org/11361
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>