valueDiff for arrays?

[Brian Milby]

I guess I'll have to admit I had to do the line-by-line to see it, but once
I did I realized what the problem was.  Pointers and reference counting is
one thing that I still really need to think about when looking at lower
level code.  That is one thing that really does make LCS nice.  LCB too for
the most part, you can get into pointer stuff, but it is when you venture
there on purpose (FFI and/or using engine library code).