* marshal.c (struct {dump,load}_arg): manage with dfree, instead
	  of using local variable which may be moved by context switch.
	  [ruby-dev:39425]

	* marshal.c (mark_dump_arg): mark destination string.  patch by
	  Vit Ondruch.  [Bug #4339]

	* marshal.c (clear_dump_arg, clear_load_arg): clean up also data
	  tables as same as symbols tables.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@34867 b2dd03c8-39d4-4d8f-98ff-823fe69b080e