hotseat: NPE fix at the beginning of 2nd match

src/main/java/forge/game/GameAction.java

@@ -1488,6 +1488,12 @@ public class GameAction {
             }
         }
         
+        if ( goesFirst == null ) { 
+            // This happens in hotseat matches when 2 equal lobbyplayers play. 
+            // Noone of them has lost, so cannot decide who goes first .
+            goesFirst = game.getPlayers().get(0); // does not really matter who plays first - it's controlled from the same computer.
+        }
+    
         boolean willPlay = goesFirst.getController().getWillPlayOnFirstTurn(isFirstGame);
         goesFirst = willPlay ? goesFirst : goesFirst.getOpponent();
         return goesFirst;