Merge #3450

3450: Fix veto r=Learath2 a=def-

We have to check the actual player too, not just its dummies.

## 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: def <dennis@felsin9.de>

src/game/server/gamecontext.cpp

@@ -877,10 +877,11 @@ void CGameContext::OnTick()
 					// veto right for players who have been active on server for long and who're not afk
 					if(!IsKickVote() && !IsSpecVote() && g_Config.m_SvVoteVetoTime)
 					{
-						// look through all players with same IP again
-						for(int j = i + 1; j < MAX_CLIENTS; j++)
+						// look through all players with same IP again, including the current player
+						for(int j = i; j < MAX_CLIENTS; j++)
 						{
-							if(!m_apPlayers[j] || str_comp(aaBuf[j], aaBuf[i]) != 0)
+							// no need to check ip address of current player
+							if(i != j && (!m_apPlayers[j] || str_comp(aaBuf[j], aaBuf[i]) != 0))
 								continue;
 
 							if(m_apPlayers[j] && !m_apPlayers[j]->m_Afk && m_apPlayers[j]->GetTeam() != TEAM_SPECTATORS &&