TreeColorMapper: Unmapped nodes when using ' Sholl inters.' mapping

[tferr]

Reported here: https://forum.image.sc/t/imagej-snt-problem-about-colored-paths-by-sholl-inters-in-the-reconstruction-viewer/78578/3?u=tferr, and reproduced using the file provided in the post.

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/imagej-snt-problem-about-colored-paths-by-sholl-inters-in-the-reconstruction-viewer/78578/4