XS.xs: Fix RT#123869 - context arg to croak()
XS.xs: Fix RT#123869 - context arg to croak()

Fix RT#123869 reported by Zefram where accidently a croak was called with
an aTHX_ argument.

Signed-off-by: Jens Rehsack <69d49c504a9219a55b8be0f905e8fe3c32ffb57f@netbsd.org>

perl5-utils/List-MoreUtils-XS,perl5-utils/List-MoreUtils-XS