vm.c: fix `cfp consistency error' which occurs when raising exception in bmethod call event
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm.c: fix `cfp consistency error' which occurs
when raising exception in bmethod call event
[ruby-dev:50162] [Bug #13705]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e