panvk: Avoid division by zero for vkCmdCopyQueryPoolResults

Stride can be zero if there are less than two queries to copy.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Fixes: 7755c41b3ef ("panvk/csf: Rework the occlusion query logic to avoid draw flushes")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34020>
1 file changed