Merge #4168

4168: Clear game info on connect r=Jupeyy a=heinrich5991

Previously, the old game info persevered into the next server.

<!-- What is the motivation for the changes of this pull request -->

## Checklist

- [x] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: heinrich5991 <heinrich5991@gmail.com>

src/game/client/gameclient.cpp

@@ -453,6 +453,7 @@ void CGameClient::OnConnected()
 
 	m_GameWorld.Clear();
 	m_GameWorld.m_WorldConfig.m_InfiniteAmmo = true;
+	mem_zero(&m_GameInfo, sizeof(m_GameInfo));
 	m_PredictedDummyID = -1;
 	for(auto &LastWorldCharacter : m_aLastWorldCharacters)
 		LastWorldCharacter.m_Alive = false;