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

[imikejackson]

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:

 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.