give -9 for quit players

ygopro-server.coffee

@@ -1395,6 +1395,8 @@ class Room
         else
           for player in @players when player.pos != 7
             @scores[player.name_vpass] = -5
+          if @players.length == 2
+            @scores[client.name_vpass] = -9
         @arena_score_handled = true
       index = _.indexOf(@players, client)
       @players.splice(index, 1) unless index == -1

ygopro-server.js

@@ -1816,6 +1816,9 @@
                 this.scores[player.name_vpass] = -5;
               }
             }
+            if (this.players.length === 2) {
+              this.scores[client.name_vpass] = -9;
+            }
           }
           this.arena_score_handled = true;
         }