B/W Print: Make sure that all colors are monochrome

Some colors such as the ones for ceiling were still green on B/W
print. This patch makes all colors in the second row
of profile.c:profile_color monochrome.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>