Doesn't install on MSWin32 if current directory (or parent) name starts with o

Hi there, this patch fixes this failure for me:

http://www.cpantesters.org/cpan/report/02b244fe-73bd-1014-9c15-1273adef1522

I am seeing this failure because the path that I am installing in has a directory that starts with the letter o, and "\o" has special meaning.