hash.c: fix symbol hash
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
hash.c: fix symbol hash
Symbol. [Bug #9381]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e