[Mesa3d-dev] [PATCH] softpipe: Fix division by zero

[Arpad B. <arp...@go...>]

Sorry about my last mail which was empty except for the attached patch.
The patch fixes a division by zero crash which is triggered when I run 
the cairo test-suite using its gl backend and the gallium softpipe driver.
The test-suite still crashes when I'm using llvmpipe, need to look into 
that.