Don't complain about transitioning back to PRE_GAME.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@428 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/parlor/game/client/GameController.java

@@ -207,6 +207,8 @@ public abstract class GameController extends PlaceController
     protected boolean stateDidChange (int state)
     {
         switch (state) {
+        case GameObject.PRE_GAME:
+            return true;
         case GameObject.IN_PLAY:
             gameDidStart();
             return true;