ruby.h: clear expression
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36819 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ruby.h: clear expression
warning, and zero-expand to VALUE before bit negation to get rid of
confusion.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36819 b2dd03c8-39d4-4d8f-98ff-823fe69b080e