anv/image: Use vk_zalloc instead of an explicit memset

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/vulkan/anv_image.c

@@ -358,12 +358,11 @@ anv_image_create(VkDevice _device,
    anv_assert(pCreateInfo->extent.height > 0);
    anv_assert(pCreateInfo->extent.depth > 0);
 
-   image = vk_alloc2(&device->alloc, alloc, sizeof(*image), 8,
-                      VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
+   image = vk_zalloc2(&device->alloc, alloc, sizeof(*image), 8,
+                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
    if (!image)
       return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);
 
-   memset(image, 0, sizeof(*image));
    image->type = pCreateInfo->imageType;
    image->extent = pCreateInfo->extent;
    image->vk_format = pCreateInfo->format;