* marshal.c (compat_allocator_table): hide the wrapper object of
  compat_allocator_tbl.

* process.c (rb_execarg_new): hide wrapper objects of struct
  rb_execarg.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61009 b2dd03c8-39d4-4d8f-98ff-823fe69b080e