[GRASS5] r.colors bug fix

[Helena Mitasova]

Glynn,

would you be so kind and implement and submit the following bug fix for
r.colors
in main.c

the ERROR map not found should have cmap and not name.

    170     else{  /* use color from another map (cmap) */
    171         cmapset = G_find_cell2 (cmap, "");
    172         if (cmapset == NULL) {
>>173             fprintf (stderr, "ERROR: %s - map not found\n", name);
    174             exit(1);
    175         }

Currently, when you give
r.colors mymap rast=colmap
and "colmap" does not exist it tells you that "mymap" does not exist.
I always forget about this "behavior" and spend quite a bit of time trying
to figure out why it cannot find "mymap" when it is actually there.
I am probably not alone and the fix should be easy if I identified it
correctly.

thanks,

Helena