Revert "Revert "suppress spurious bw/grayscale warning in blla""
Revert "Revert "suppress spurious bw/grayscale warning in blla""

This reverts commit d8504b82b691cf943db4c2e3ad82ce7bd569ece5.

mittagessen/kraken,mittagessen/kraken,mittagessen/kraken,mittagessen/kraken