[nsp] Output errors on ATM interface

[Vincent De Keyzer]

Brian,

>     * A packet is scheduled for transmission on a VC which is not in the
UP status.

this could be the case as I have seen some "INAC" ("inactive" I guess?) PVCs
in the last days.

Now they are all up, I have cleared the counters and I will see if errors
still occur. Doesn't seem to be the case after only 143000 packets.

Thanks already,

Vincent