EMEBSDDIpreview fails when pattern data is at the root level of HDF5 file

Using EMEBSDDIpreview with pattern data at the very top level will result in read warnings on GFortran and a crash on IFort compiled versions of EMsoft.

From the GFortran we get:
```Number of command line arguments detected: 1
Averaging patterns over 1 by 1 area
Error code : -1
returned by routine HDF_readHyperslabIntegerArray3D:h5dopen_f: ```

Same warnings with IFort but ends in a crash.