support.

* bcc32/setup.mak: check runtime version.

* win32/win32.c (rb_w32_open_osfhandle): prototype has changed
  in bcc 5.82.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12831 b2dd03c8-39d4-4d8f-98ff-823fe69b080e