merge revision(s) 39595: [Backport #8014]

	* ext/objspace/objspace.c (count_nodes): count also newly added nodes,
	  and fix key for unknown node.  patch by tmm1 (Aman Gupta) in
	  [ruby-core:53130] [Bug #8014]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39913 b2dd03c8-39d4-4d8f-98ff-823fe69b080e