Re: [PATCH 0/1] MR8885: winevulkan: Handle NULL buffer pointer in vkFreeCommandBuffers().

[Paul Gofman (＠gofman)]

From Vulkan spec:
```
VUID-vkFreeCommandBuffers-pCommandBuffers-00048
pCommandBuffers must be a valid pointer to an array of commandBufferCount VkCommandBuffer handles, each element of which must either be a valid handle or NULL
```

So NULL elements of buffers array are allowed and should be handled.