BUG: Always return views from structured_to_unstructured when possible

Also applies to unstructured_to_structured

While producing correct resutls, the test added in this commit would previously make an unecessary copy, causing the assertion to fail.
The cause was `astype` was being asked to convert from a subarray of shape `(x, y)` to one of `(x*y,)`, which it cannot do without making a copy.

This changes the approach used to skip the step of flattening subarrays to 1d

0 files changed, 0 insertions, 0 deletions