vm.c: frozen_strings in rb_vm_t
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51511 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm.c: frozen_strings in rb_vm_t
table in rb_vm_t. [ruby-core:70274] [Bug #11423]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51511 b2dd03c8-39d4-4d8f-98ff-823fe69b080e