Prevent too many defenders on same PW planet, fix #3026

A race condition where two players join simultaneously can cause the
count to skip past TeamSize, making the == check miss and leaving the
challenge open for minutes until the timer fires. With >= the challenge
triggers immediately even if the count overshoots.

Author: Licho1

ZkLobbyServer/SpringieInterface/PlanetWarsMatchMaker.cs

@@ -332,7 +332,7 @@ private async Task JoinPlanetAttack(int targetPlanetId, string userName)
 
                                 await conus.SendCommand(new PwJoinPlanetSuccess() { PlanetID = targetPlanetId });
 
-                                if (attackOption.Attackers.Count == attackOption.TeamSize) await StartChallenge(attackOption);
+                                if (attackOption.Attackers.Count >= attackOption.TeamSize) await StartChallenge(attackOption);
                                 else await UpdateLobby();
                             }
                         }
@@ -361,7 +361,7 @@ private async Task JoinPlanetDefense(int targetPlanetID, string userName)
 
                             await conus.SendCommand(new PwJoinPlanetSuccess() { PlanetID = targetPlanetID });
 
-                            if (Challenge.Defenders.Count == Challenge.TeamSize) await AcceptChallenge();
+                            if (Challenge.Defenders.Count >= Challenge.TeamSize) await AcceptChallenge();
                             else await UpdateLobby();
                         }
                 }