OUString equalsIgnoreAsciiCaseAsciiL and
String EqualsIgnoreAsciiCaseAsciiL
do *not* have the same semantics.

This seems to be the intent of the code,
and hopefully what it was doing before the OUString conversion.

Change-Id: Ib1686254876f2b3105275a7f7c53eef1e20c39b6
Reviewed-on: https://gerrit.libreoffice.org/14180Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>