* vm_core.h (VM_DEBUG_BP_CHECK): set 0 as default.
  This flag specifies checking BP consistency on each frame popping.
  Now, we don't have any trouble on it, so I remove it.
  If you feel any bugs about VM execution, then set it to 1.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38768 b2dd03c8-39d4-4d8f-98ff-823fe69b080e