nr pdcp: bugfix: discard pdu if integrity fails

openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c

@@ -119,6 +119,7 @@ static void nr_pdcp_entity_recv_pdu(nr_pdcp_entity_t *entity,
       entity->stats.rxpdu_dd_pkts++;
       entity->stats.rxpdu_dd_bytes += size;
 
+      return;
     }
   }