dojo: protect against missing mark in bunt (%sa)
%dv (dy-sing hand+q.bil %a p.bil (snoc q.bil %hoon))
%ge (dy-run-generator (dy-cage p.p.p.bil) q.p.bil)
%sa
+ =/ has-mark .?((get-fit:clay he-beak %mar p.bil))
+ ?. has-mark
+ (he-diff(poy ~) %tan leaf+"dojo: %{(trip p.bil)} missing" ~)
=+ .^(=dais:clay cb+(en-beam he-beak /[p.bil]))
(dy-hand p.bil *vale:dais)
::
