Tektosyne 5.6.4 Released

Uploaded Tektosyne 5.6.4 with an embarrassing bug fix. The quad tree’s FindNodeByValue method threw a null reference exception on anything but very small trees. I didn’t notice for a long time since this method is used only during debugging… and I had plainly forgotten to call it in my unit tests. Both issues are fixed now.

Moral: Unit tests can be very helpful, but only if you actually write them!

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