Fuzz: undefiend values for images with upsampling with <=2 pixels in last group.
Fuzz: undefiend values for images with upsampling with <=2 pixels in last group.

Fixed condition to refrelct the comment.
libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl