* Sampler dword 3 only matters when a clamp mode uses border color
(values >= 4). When no border mode is active, dword 3 is unused
but can still vary across loop iterations due to wave-lane spills.
This makes resource tracking think the descriptor is dynamic and
fail with "unsupported GPU selection".
* Fix by zeroing dword 3 when all clamp modes are non-border.
Signed-off-by: Claxten <claxten10@gmail.com>