Don't try to count non-lora transmissions into airtime (or attempt to decode)

src/mesh/RadioLibInterface.cpp

@@ -278,13 +278,16 @@ void RadioLibInterface::onNotify(uint32_t notification)
                     // Send any outgoing packets we have ready
                     meshtastic_MeshPacket *txp = txQueue.dequeue();
                     assert(txp);
+                    bool isLoraTx = txp->to != NODENUM_BROADCAST_NO_LORA;
                     startSend(txp);
 
+                    if (isLoraTx) {
                         // Packet has been sent, count it toward our TX airtime utilization.
                         uint32_t xmitMsec = getPacketTime(txp);
                         airTime->logAirtime(TX_LOG, xmitMsec);
                     }
                 }
+            }
         } else {
             // LOG_DEBUG("done with txqueue");
         }