roller: don't crash if nonce not in queue
:: print error if there was one
::
~? ?=(%| -.result) [dap.bowl %send-error +.p.result]
+ :: if this nonce was removed from the queue by a
+ :: previous resend-with-higher-gas thread, it's done
+ ::
+ ?. (has:ors:dice sending [address nonce])
+ ~? lverb [dap.bowl %done-sending [address nonce]]
+ `state
=/ =send-tx (got:ors:dice sending [address nonce])
=? sending ?=(%& -.result)
%^ put:ors:dice sending
