vm_core.h: flip_cnt in rb_iseq_t
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38739 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_core.h: flip_cnt in rb_iseq_t
because it has same life span as enclosing iseq. [Bug #7671]
[ruby-core:51296]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38739 b2dd03c8-39d4-4d8f-98ff-823fe69b080e