IO Error in H5DataSet

When trying to write to a DataArray, an IO Error will occur, if the product value of the data used does not match the product value of the defined shape of the DataArray.

e.g.

```
da = b.create_data_array('name', 'type', nix.DataType.Double, [2 4]);
% will accept only arrays containing the following values,
% any other values will lead to an IO Error.
da.write_all([2 4])
da.write_all([4 2])
da.write_all([8])
da.write_all([2 2 2])
```

No source file or test is named. Start by reproducing the issue with H5DataSet/DataArray.write_all using the shapes in the example, then trace the MATLAB binding's write path to identify why mismatched products produce an IO Error. Done should be defined by the intended handling of valid and invalid array sizes.

Written by the indexing model from the issue text.