fix panic

lib/bouncer/backends/v0/accept.go

lib/bouncer/backends/v0/query.go

lib/bouncer/frontends/v0/accept.go

lib/bouncer/frontends/v0/authenticate.go

lib/fed/middlewares/eqp/state.go

lib/fed/middlewares/ps/client.go

lib/fed/middlewares/ps/server.go

lib/fed/packet.go

lib/gsql/row.go