e50bf059b0
From the Vulkan 1.0.29 spec for vkCmdClearAttachments: "If the subpass’s depth/stencil attachment is VK_ATTACHMENT_UNUSED, then the clear has no effect." and "If colorAttachment is VK_ATTACHMENT_UNUSED then the clear has no effect." I have no idea why it's spec'd this way; it seems very anti-Vulkan to me, but that's what it says and it's really not much work to support. Signed-off-by: Jason Ekstrand <jason@jlekstrand.net> Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>