SendDoneToTracker can be negative

[reedy]

[Arkiver2]

Interesting, I have no idea what to make of this yet.

[TheTechRobo]

I think this might be related to the fact that when all items in a multi-item are aborted, the senddone task doesn’t ever get run. But I could be wrong.

[reedy]

FWIW, it doesn't seem this is only the telegram grabber with this issue, just the one that my warrior seems to do most often (and the number can get to -1000 or more), so I notice it.

I haven't even looked at any of the code, so I don't know if there's any sort of inheritance/base/common code used by the grabbers, and as such, something should potentially be fixed there instead