proc.c: recursion loop
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
proc.c: recursion loop
turn loop by recursion into goto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e