anv/descriptor_set: Set array_size to zero for non-existant descriptors

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Cc: "12.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit cd21015abd)

src/intel/vulkan/anv_descriptor_set.c

@@ -73,6 +73,7 @@ VkResult anv_CreateDescriptorSetLayout(
       /* Initialize all binding_layout entries to -1 */
       memset(&set_layout->binding[b], -1, sizeof(set_layout->binding[b]));
 
+      set_layout->binding[b].array_size = 0;
       set_layout->binding[b].immutable_samplers = NULL;
    }