radv: handle fence allocation failing

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 75b7af1..c1438fe 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -1131,7 +1131,10 @@
 	fence->submitted = false;
 	fence->signalled = !!(pCreateInfo->flags & VK_FENCE_CREATE_SIGNALED_BIT);
 	fence->fence = device->ws->create_fence();
-
+	if (!fence->fence) {
+		vk_free2(&device->alloc, pAllocator, fence);
+		return VK_ERROR_OUT_OF_HOST_MEMORY;
+	}
 
 	*pFence = radv_fence_to_handle(fence);