In CheckTeamLeader, make sure to only set one client as team leader. Reported by Tobias Kuehnhammer.

code/game/g_main.c

@@ -1644,6 +1644,8 @@ void CheckTeamLeader( int team ) {
 				break;
 			}
 		}
+
+		if (i >= level.maxclients) {
 			for ( i = 0 ; i < level.maxclients ; i++ ) {
 				if (level.clients[i].sess.sessionTeam != team)
 					continue;
@@ -1651,6 +1653,7 @@ void CheckTeamLeader( int team ) {
 				break;
 			}
 		}
+	}
 }
 
 /*