core/txpool/tracking: fix nil deref

core/txpool/tracking/tx_tracker.go

@@ -90,7 +90,9 @@ func (tracker *TxTracker) TrackAll(txs []*types.Transaction) {
 			tracker.byAddr[addr] = legacypool.NewSortedMap()
 		}
 		tracker.byAddr[addr].Put(tx)
-		_ = tracker.journal.insert(tx)
+		if tracker.journal != nil {
+			_ = tracker.journal.insert(tx)
+		}
 	}
 }