* vm_insnhelper.c (vm_search_method): no need to check klass == ci->klass
  in method cache guard - class sequence number has the same uniqueness
  guarantees

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42836 b2dd03c8-39d4-4d8f-98ff-823fe69b080e