Possible use of readers with null id

[hinerm]

Reported by Michael Meuli:

Problem encoutered while reading image file : single-channel.ome.tif

itk::ExceptionObject (0x81520e0)
Location: "unknown"
File: /home/michael/Colocalization/ITK-4.5.1-build/Modules/Remote/SCIFIO
/src/itkSCIFIOImageIO.cxx
Line: 180
Description: itk::ERROR: SCIFIOImageIO(0x8150fb0): SCIFIOImageIO
exited abnormally. Exception in thread "main"
java.lang.IllegalStateException: ImageReader.getSeries: Current file
should not be null; call setId(String) first
at loci.formats.FormatTools.assertId(FormatTools.java:724)
at loci.formats.ImageReader.getReader(ImageReader.java:200)
at loci.formats.ImageReader.getSeries(ImageReader.java:441)
at loci.formats.ReaderWrapper.getSeries(ReaderWrapper.java:343)
at loci.scifio.itk.SCIFIOITKBridge.executeCommand(SCIFIOITKBridge.java:116)
at loci.scifio.itk.SCIFIOITKBridge.executeCommand(SCIFIOITKBridge.java:108)
at loci.scifio.itk.SCIFIOITKBridge.waitForInput(SCIFIOITKBridge.java:83)
at loci.scifio.itk.SCIFIOITKBridge.executeCommand(SCIFIOITKBridge.java:161)
at loci.scifio.itk.SCIFIOITKBridge.main(SCIFIOITKBridge.java:693)

There could be an issue where the reader can be constructed with a null id, and then its getSeries method checked. Should probably at least check if the current file is null before checking the series...