win32/file.c: check ASCII encodings first
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32/file.c: check ASCII encodings first
ordinary mapping.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e