Pixman call needed a wrapper to fix some rendering problems in Xming

[Colin Harrison]

> http://www.freedesktop.org/~sandmann/fillfix.patch

> and see if it also fixes?

Doesn't fix the Xming rendering problem.

A refresh of the fbGetDrawable (with new automatic variables) was how the
original fbSolidFillmmx function worked.
I just re-instated the original and then brought it up-to-date (i.e. with
the new pixman_fill call) to derive my patch empirically, i.e. by
brute-force testing.
No great flashes of genius or knowledge of why it works, I'm afraid!

Thanks,
Colin