- Basic NPE prevention in showCard, please review (not sure if there's a better way to prevent this NPE that would be more desirable).

forge-gui/src/main/java/forge/gui/match/controllers/CPicture.java

@@ -62,6 +62,10 @@ public enum CPicture implements ICDoc {
      * 
      */
     public void showCard(final Card c, boolean showFlipped) {       
+        if (null == c) {
+            return;
+        }
+
         currentCard = c; 
         displayedState = c.getCurState();
         flipIndicator.setVisible(isCurrentCardFlippable());