4769: Fix integer overflow in CHud when server time exceeds around 248 days r=def- a=Robyt3
Fixes the server timer in the HUD showing 00:00 when the server time exceeds around 248 days.
Tested on "Vanilla Teeworlds Server - CTF":
Otherwise connecting to this server causes:
```
/src/game/client/components/hud.cpp:128:17: runtime error: signed integer overflow: 26254443 * 100 cannot be represented in type 'int'
#0 0x55c8b6722e7d in CHud::RenderGameTimer() /src/game/client/components/hud.cpp:128
#1 0x55c8b675cdfc in CHud::OnRender() /src/game/client/components/hud.cpp:855
#2 0x55c8b6babec7 in CGameClient::OnRender() /src/game/client/gameclient.cpp:598
#3 0x55c8b62b0330 in CClient::Render() /src/engine/client/client.cpp:1179
#4 0x55c8b6301a62 in CClient::Run() /src/engine/client/client.cpp:3155
#5 0x55c8b635fc34 in main /src/engine/client/client.cpp:4427
#6 0x7f581a6150b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#7 0x55c8b60f478d in _start (/build-asan/DDNet+0x1bd978d)
```
## 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
- [X] Changed no physics that affect existing maps
- [X] 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: Robert Müller <robytemueller@gmail.com>
3a28f5fc6e
