NullPOinterException in MiC 3D

[biovoxxel]

Handing in 2 32-bit image stacks into MiC 3D comparator lead to the following error:

[ERROR] Command errored: Mask instant Comparator 3D java.lang.NullPointerException at fr.curie.mic.MicUtils.checkImagePlus(MicUtils.java:145) at fr.curie.mic.MaskInstantComparator3D.getChoicesFromGD(MaskInstantComparator3D.java:423) at fr.curie.mic.MaskInstantComparator3D.run(MaskInstantComparator3D.java:98) at ij.IJ.runUserPlugIn(IJ.java:244) at ij.IJ.runPlugIn(IJ.java:210) at ij.IJ.runPlugIn(IJ.java:199) at net.imagej.legacy.command.LegacyCommand.run(LegacyCommand.java:57) at org.scijava.command.CommandModule.run(CommandModule.java:196) at org.scijava.module.ModuleRunner.run(ModuleRunner.java:165) at org.scijava.module.ModuleRunner.call(ModuleRunner.java:125) at org.scijava.module.ModuleRunner.call(ModuleRunner.java:64) at org.scijava.thread.DefaultThreadService.lambda$wrap$2(DefaultThreadService.java:247) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:750)

Checking MicUtils.java:145 it tries to retrieve the original image info

MiC/src/main/java/fr/curie/mic/MicUtils.java

Lines 142 to 150 in 77546ee

	public static void checkImagePlus(ImagePlus imp){
	//IJ.log("image type: "+imp.getFileInfo().fileType);
	//IJ.log("image type (original): "+imp.getOriginalFileInfo().fileType);
	if(imp.getOriginalFileInfo().fileType== FileInfo.GRAY16_SIGNED){
	//IJ.log("correct 16-bit signed");
	ImageConverter converter=new ImageConverter(imp);
	converter.convertToGray32();
	converter.convertToGray16();
	}

I think the getOriginalFileInfo can return null if that info is not existent. Therefore, a null check would need to be included at that point before retrieving the image type.