From d4f8453c2294b37d6f888f7d7a69f83437bd137e Mon Sep 17 00:00:00 2001
From: Peter Nelson <peter1138@openttd.org>
Date: Wed, 6 Nov 2024 13:51:26 +0000
Subject: [PATCH] Codefix: Clear and reserve storage when loading vectors from
 savegames.

---
 src/saveload/saveload.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 75681fc548..1a8361ff3f 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -1297,6 +1297,11 @@ public:
 					default: NOT_REACHED();
 				}
 
+				list->clear();
+				if constexpr (std::is_same_v<SlStorageT, std::vector<Tvar, Tallocator>>) {
+					list->reserve(length);
+				}
+
 				/* Load each value and push to the end of the storage. */
 				for (size_t i = 0; i < length; i++) {
 					Tvar &data = list->emplace_back();