tree 7b0b1764f47bda77c821b0cffce8ccb981036a8f
parent de93347d482a96f88c898622c9620f03e677e386
author Mathias Fröhlich <Mathias.Froehlich@web.de> 1322768890 +0100
committer Mathias Fröhlich <Mathias.Froehlich@web.de> 1322772297 +0100

swrast: Fix signed/unsigned problems with negative strides.

In swrast_map_renderbuffer negative strides lead to
render buffer map pointers that are off by 2^32.
Make sure that intermediate negative values are not
converted to an unsigned.

Signed-off-by: Mathias Froehlich <Mathias.Froehlich@web.de>
Reviewed-by: Brian Paul <brianp@vmware.com>