5285: Fix clamp in CStun::Update (fixes #5282) r=heinrich5991 a=def-

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## Checklist

- [ ] 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: Dennis Felsing <dennis@felsin9.de>
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bors[bot] 2022-05-31 12:11:24 +00:00 committed by GitHub
commit 369c217db5
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@ -30,7 +30,7 @@ static const char *IndexToSystem(int Index)
static int RetryWaitSeconds(int NumUnsuccessfulTries)
{
return (1 << clamp(0, NumUnsuccessfulTries, 9));
return (1 << clamp(NumUnsuccessfulTries, 0, 9));
}
CStun::CProtocol::CProtocol(int Index, NETSOCKET Socket) :