Somethink broke minimum function

[Martin Michel]

Hi Jürgen,

I guess this is a regression defect.
It was working correctly at SVN 1574 but at some commit up to SVN 1592 
something broke.

Now, when I run this to get the minimum of an array with some numbers, I get:

      ⌊⌿0.123 0.456 0.789
0

Apparently, maximum works fine:

      ⌈⌿0.123 0.456 0.789
0.789

Kind regards,
Martin