l1_if: don't print measurements a second time in case of error
l1_if: don't print measurements a second time in case of error

geosphere/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,geosphere/osmo-bts