MyPaint brush does not work on indexed image
GIMP version: master
Operating System: Linux Fedora 29
Package: self-built
Description of the bug
MyPaint brush does not paint anything on an indexed image.
Reproduction
Is the bug reproducible? Always
Reproduction steps:
- Create/open an indexed image
- Try to paint with mypaint brush and any color in the current colormap
…
Expected result: it paints!
Actual result: nothing