[Mesa-dev] r600g: various fixes to get r600_clear and depthtesting working

[Bas Nieuwenhuizen]

Hello,

I wrote two patches that fix various things to get r600g running on my
computer and to get r600_clear and depthtesting working.

I wrote them starting from Marek's r600g branch.

Feel free to criticize as this is my first contribution to a large
project. 

- Bas Nieuwenhuizen

patches:
http://www.basnieuwenhuizen.nl/0001-r600g-various-fixes.patch
http://www.basnieuwenhuizen.nl/0002-r600g-fixed-some-corruption-added-code-for-depthtest.patch