Description

When testing Philips_2DEPI_FEAST_Longitudinal_FLAIR_LGA_ASL_PartlyDone_HiQ/derivatives/ExploreASL/151001_1 this crashed in xASL_vis_CreateVisualFig because the overlay WMH_SEGM over FLAIR was empty. Now it prints a subtle warning (not warning() but fprintf()) and uses the empty overlay (essentially printing the FLAIR image without the overlay in this example.

How to test

Create a NIfTI with an empty image matrix an try to overlay this over another image, using this function.

Release notes

#??? xASL_vis_CreateVisualFig: allow empty overlays