G-Node/nix — pull request #344 by jgrewe (2014-08-16 22:16:56+00:00)
Title: improved stability of guess chunking

guess chunking had a little problem with rather "unbalanced" data sizes. E.g. in the case of a 4d like 640x480x3x20 matrix the guess chunking algorithm reduced the third dimension to 0 size, which cannot work.
The fix only divides the size of a dimension if it is larger than 1.