merge revision(s) 42282: [Backport #8785]
* parse.y: fix build error with bison-3.0.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42590 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 42282: [Backport #8785]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42590 b2dd03c8-39d4-4d8f-98ff-823fe69b080e