parse.y: fix argument type

* parse.y (is_global_name_punct): fix argument type, to get rid of
  implicit promotion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40723 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
iphlpapi is unavailable with older VC

* include/ruby/win32.h, win32/Makefile.sub, win32/win32.c: iphlpapi is
  not available with older Visual C.  works with VC9 or later at least.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40724 b2dd03c8-39d4-4d8f-98ff-823fe69b080e