Reserve vector size when loading station flow stats

src/sl/station_sl.cpp

@@ -646,6 +646,7 @@ static void Load_STNN()
 				SlObjectLoadFiltered(&st->goods[i], _filtered_goods_desc);
 				StationID prev_source = INVALID_STATION;
 				if (SlXvIsFeaturePresent(XSLFI_FLOW_STAT_FLAGS)) {
+					st->goods[i].flows.reserve(_num_flows);
 					for (uint32 j = 0; j < _num_flows; ++j) {
 						FlowSaveLoad flow;
 						buffer->CheckBytes(2 + 4);

src/station_base.h

@@ -493,6 +493,11 @@ public:
 		return this->flows_index.begin()->first;
 	}
 
+	void reserve(size_t size)
+	{
+		this->flows_storage.reserve(size);
+	}
+
 	void SortStorage();
 };