Related: fdo#33455 retain color on scaling of 1 bit depth pngs

load test doc and zoom in and out and at certain zoom levels
its correctly black and at others its red

(cherry picked from commit be9d65bb5f5a83c19eec02a037b8f808de70ecb8)

Change-Id: I445ce672742ddb6d6592ef419bf5e14c5f09a5b5
Reviewed-on: https://gerrit.libreoffice.org/9923
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>