kpHeatmap Fails when only one y value that is not 1

[drneavin]

Hello @bernatgel,

I've noticed an error that occurs when using kpHeatmap is used if there is only one y value and it is not 1:

Error in grDevices::rgb(cr(y), max = 255) : 
  color intensity NA, not in 0:255
Calls: kpHeatmap ... kpRect -> filterParams -> <Anonymous> -> <Anonymous>
In addition: Warning message:
In brewer.pal(length(values), "BrBG") :
  minimal value for n is 3, returning requested palette with 3 different levels

I can trick it to work if I set the value to 1 and then set the legend manually using the actual value.