[Numpy-discussion] Bug in nanmin called with unsigned integers

[Tony S Yu]

I got bit again by this bug with unsigned integers. (My original changes got overwritten when I updated from svn and, unfortunately, merged conflicts without actually looking over the changes.) 

In any case, I thought it'd be a good time to bump the issue (with patch).

Cheers,
-Tony

PS: Just for context, this issue comes up when displaying images with Chaco (which converts images to unsigned integer arrays and calls nanmin).

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