win32.c: static API pointers
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55816 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32.c: static API pointers
API pointers static not to get the address everytime.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55816 b2dd03c8-39d4-4d8f-98ff-823fe69b080e