* ext/dl/cfunc.c (dlcfunc_mark), ext/dl/cptr.c (dlptr_mark):
	  workaround to mark wrapped object.  this is not a true fix,
	  because [Bug #4929] is caused by the interface design of DL.

	* ext/dl/cptr.c (rb_dlptr_s_to_ptr): fix wrapping condition.

	* ext/dl/cptr.c (rb_dlptr_s_to_ptr): fix wrapping condition.

	* ext/dl/cptr.c (rb_dlptr_s_to_ptr): use rb_check_funcall.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34604 b2dd03c8-39d4-4d8f-98ff-823fe69b080e