pan/layout: Fix WSI.Import test

We were leaving the depth to zero, but the layout code expects a depth
of at least one.

Add an assert() in pan_image_layout_init() to catch this in the future.

Fixes: 916f75a2a6 ("pan/layout: Test WSI import behavior on all supported format/mods")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35555>

src/panfrost/lib/pan_layout.c

@@ -528,6 +528,10 @@ pan_image_layout_init(
 
    assert(props->extent_px.depth == 1 || props->nr_samples == 1);
 
+   /* Make sure the extent/sample_count is not zero. */
+   assert(props->extent_px.width && props->extent_px.height &&
+          props->extent_px.depth && props->nr_samples);
+
    struct pan_image_extent mip_extent_px = {
       .width = util_format_get_plane_width(props->format, plane_idx,
                                            props->extent_px.width),

src/panfrost/lib/tests/test-layout.cpp

@@ -716,6 +716,7 @@ TEST(WSI, Import)
                .extent_px = {
                   .width = IMAGE_WIDTH,
                   .height = IMAGE_HEIGHT,
+                  .depth = 1,
                },
                .nr_samples = 1,
                .dim = MALI_TEXTURE_DIMENSION_2D,