[GRASS5] [bug #1896] (grass) colortable in ps.map is not grey-colored when greyrast is used

this bug's URL: http://intevation.de/rt/webrt?serial_num=1896
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Subject: colortable in ps.map is not grey-colored when greyrast is used

Platform: GNU/Linux/i386
grass obtained from: Mirror of Trento site
grass binary for platform: Downloaded precompiled Binaries
GRASS Version: 5.0.2

When having this input file for ps.map, the colortable is still full-color
instead of in the levels of grey:

greyrast tr_towns.r
colortable
end
vector hydro
    width 0.25
    color blue
    acolor 0 0 255
end
vector towns2000
    width 1
    color brown
end

I suppose that it is wrong as without grey colortable, there is not much
sense to greyrast in the first place (and I am very grateful to have it,
because greycolors are much better for printing than badly transposed colors).

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