core/txpool/tracking: fix nil deref

core/txpool/tracking/tx_tracker.go

@@ -90,9 +90,11 @@ func (tracker *TxTracker) TrackAll(txs []*types.Transaction) {
 			tracker.byAddr[addr] = legacypool.NewSortedMap()
 		}
 		tracker.byAddr[addr].Put(tx)
+		if tracker.journal != nil {
 			_ = tracker.journal.insert(tx)
 		}
 	}
+}
 
 // recheck checks and returns any transactions that needs to be resubmitted.
 func (tracker *TxTracker) recheck(journalCheck bool) (resubmits []*types.Transaction, rejournal map[common.Address]types.Transactions) {