[GRASSLIST:4349] big colr file - workaround

[tatel at euskalnet.net]

Hi all,

I worked around the problem simply overwriting all colr files bigger
than 32K with a correct one. Now the tiles made by r.patch display as
fast as do the tiles made by r.mapcalc, and no changes in colors are
noticed.

But I still would to know why r.patch makes his work wrong sometimes.
Some months ago, I patched some 80.000 RGB tiles without error.

*Please*, can someone explain it?

Thanks,

Roman