Don't flush coherent maps on vulkan when there are no command buffers
Don't flush coherent maps on vulkan when there are no command buffers

* Normally this is handled by checking referenced IDs, but we now
  unconditionally flush memory with BDA buffers bound to it.

Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc