venus: fix sample location info validity

Only look for sample location info when MSAA state is valid.

Test: dEQP-VK.api.pipeline.pipeline_invalid_pointers_unused_structs.graphics

Fixes: ff64092ff34 ("venus: support VK_EXT_sample_locations")
Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33696>
1 file changed