amverify and runtapes > 1

[Carey Jung]

When running amverify with a tape changer and runtapes set to n greater than
1, we've noticed that amverify will verify the current tape and the next
runtapes-1 tapes, even if they weren't all used during the previous amdump.
Is this a bug or a feature?  It creates unnecessary usage on the unused
tapes.

thanks,
Carey