set m_invalPath so new network game will be drawn correctly first time

back in GamesList

xwords4/android/XWords4/src/org/eehouse/android/xw4/GamesList.java

@@ -89,6 +89,7 @@ public class GamesList extends XWListActivity
                     String path = addGame( true );
                     GameUtils.doConfig( GamesList.this, path, 
                                         RelayGameActivity.class );
+                    m_invalPath = path;
                 }
             });