Ruby

vm_eval.c: eval_string_protect wrapper

• vm_eval.c (eval_string_protect): cast data instead of the
  function pointer, to suppress "cast between incompatible
  function types" warning by gcc 8.1.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63359 b2dd03c8-39d4-4d8f-98ff-823fe69b080e