GrADS Maskout File null path exception

[nvirus]

GrADS Maskout File

• GrADSDataInfo - Path cannot be null Exception.
  File FrmOutputMapData add the following to line 513 to correct it:
  aDataInfo.FileName = aFile;

[Yaqiang Wang]

Thanks for you bug report and fix sollution. I have update the code following your report.