Comment 8 for bug 1804621

For the record, I'm herein attaching a patch that would make aabbExtrema() back to a tuple, cancelling the effects of commits 1db13fb ( = [*] in the bug report) and 7c60d78 ( = more recent commit mentioned in #2)

As of now, I do not think this patch should be applied, see other comments regarding the (lack of) detected problems