fix one vulkan validation warning
fixes validation warning
VUID-VkAttachmentDescription-finalLayout-00843(ERROR / SPEC): msgNum: 0 - pCreateInfo->pAttachments[0].finalLayout must not be VK_IMAGE_LAYOUT_UNDEFINED or VK_IMAGE_LAYOUT_PREINITIALIZED. The Vulkan spec states: finalLayout must not be VK_IMAGE_LAYOUT_UNDEFINED or VK_IMAGE_LAYOUT_PREINITIALIZED (https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#VUID-VkAttachmentDescription-finalLayout-00843) Objects: 1 [0] 0, type: 0, name: NULL