Commit e176f939862d4846859ce3ad3a003b38d98a6424 Parent 6baeaf39441895c0374974d96da84f2e3979cfb2 Author John MacFarlane <jgm@berkeley.edu> Date Fri, 5 Dec 2014 10:05:27 -0800 Changed CMARK_NODE_NONE from -1 to 0. This is more consistent with CMARK_LIST_NONE, etc.