no more gif problem + nice surprise

[Peter Mehlitz]

> Kaffe's configure script looks for both libgif and libungif, and links
> with both of them.  I'm not sure this is right, though; we should
> probably not look for one of them if we find the other.  But I don't
> know which one is to be preferred, does anybody?

Has to be libungif (>=4.0) because of the DGifOpen extension (our patch reg.
alternate input methods)

-- Peter