added println to WalkDocumentItem::get_leaves().  without this println, a release build crashes when running updatel.js.  with the println, a release build gets the same results as a debug build, albeit twice as fast.
added println to WalkDocumentItem::get_leaves().  without this println, a release build crashes when running updatel.js.  with the println, a release build gets the same results as a debug build, albeit twice as fast.

zumero/Elmo,zumero/Elmo