SitePen/dgrid — pull request #669 by edhager (2013-07-23 19:28:34+00:00)
Title: Fix #361: OnDemandList: empty preload node caused preload processing to stop.

In cases where the first/top preload node was visible but empty, the second/bottom one was not being processed. The top one had to be scrolled beyond the buffer limit before the second one was processed.