win32/Makefile.sub: fix typo
Other places are using RT_VER. So I guess this is correct. Currently AppVeyor CI is failing and I want to fix that.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32/Makefile.sub: fix typo
Other places are using RT_VER. So I guess this is correct.
Currently AppVeyor CI is failing and I want to fix that.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e