* parse.y: remove global_symbols::pinned_dsym
  (and ::pinned_dsym_minor_marked).
  Mark pinned dsymbols by rb_gc_register_mark_object() because
  they are immortal.
* prase.y (rb_gc_free_dsymbol): rename parameter name `ptr' to `sym'.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46749 b2dd03c8-39d4-4d8f-98ff-823fe69b080e