Can't find a path after a few search

[wallpap3r]

currentNode.closed = true
and didn't make it dirty so that when a new search begins, the function Graph.cleanDirty() may not reset the closed node, and finally it will result in no valid path

do a search and choose a nearby node for new target can easily reproduce it.

I added graph.makeDirty(currentNode) to fix it, but I didn't test it for a full round

[wibimaster]

+1

[bibodha]

+1

[manthrax]

I figured out that bug I think. The "closed" nodes aren't getting cleaned properly between searches.
Look here for a fix:

#52