parse.y: fix block passing with empty kwargs
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: fix block passing with empty kwargs
an empty keyword argument hash splat is optimized away.
[ruby-core:88890] [Bug #15087]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e