vm_eval.c: rb_catch_protect

* vm_eval.c (rb_catch_protect): new function similar to
  rb_catch_obj(), but protect from all global jumps like as
  rb_load_protect(), rb_protect(), etc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e