FVWM: [parse_colorset]: <> error reading root background

[despen]

Hi,

I get the subject line error message from fvwm.

The error occurs putting a pixmap in a colorset like this:

Colorset 2 TiledPixmap weird10.xpm

As long as the xpm file has no mask, you get the error.
The logic is in fvwm/colorset.c:

  if (image != None && mask_image != None)
  {
...
  }
  else
  {
   fvwm_msg(
     ERR, "parse_colorset",
     "error reading root background");

In this case there is an image but no mask.
XPM images only have a mask if one of the colors in
the image is "None".

I can't see any reason the message should not be removed,
but I think I might be missing something because the message
makes no sense to me.  It doesn't look like it's reading the
root background.