Console: check_caches should also log failure messages to the console

src/console_cmds.cpp

@@ -3022,7 +3022,10 @@ DEF_CONSOLE_CMD(ConCheckCaches)
 	if (broadcast) {
 		DoCommandP(0, 0, 0, CMD_DESYNC_CHECK);
 	} else {
-		CheckCaches(true, nullptr, CHECK_CACHE_ALL | CHECK_CACHE_EMIT_LOG);
+		auto logger = [&](const char *str) {
+			IConsolePrint(CC_WARNING, str);
+		};
+		CheckCaches(true, logger, CHECK_CACHE_ALL | CHECK_CACHE_EMIT_LOG);
 	}
 
 	return true;

src/openttd.cpp

@@ -1473,8 +1473,11 @@ void CheckCaches(bool force_check, std::function<void(const char *)> log, CheckC
 	}
 
 	std::vector<std::string> saved_messages;
+	std::function<void(const char *)> log_orig;
 	if (flags & CHECK_CACHE_EMIT_LOG) {
-		log = [&saved_messages](const char *str) {
+		log_orig = std::move(log);
+		log = [&saved_messages, &log_orig](const char *str) {
+			if (log_orig) log_orig(str);
 			saved_messages.emplace_back(str);
 		};
 	}