#398 fixed NPE when second touch is outside of the grid ,therefore touched actor is null.

core/src/cz/nic/tablexia/util/listener/DragAndRotateActorListener.java

@@ -40,8 +40,8 @@ public class DragAndRotateActorListener extends InputListener {
     private LinkedHashMap<Integer, Point> activePointers;
 
     class Touch {
-        public static final float TIME_BETWEEN_TOUCHES  = 100;
-        public static final float TIME_BETWEEN_TAPS     = 600;
+        public static final float TIME_BETWEEN_TOUCHES = 100;
+        public static final float TIME_BETWEEN_TAPS    = 700;
 
         private long  time;
         private Actor touchedActor;
@@ -64,10 +64,13 @@ public class DragAndRotateActorListener extends InputListener {
         }
 
         private boolean controlIfSame(Touch secondTouch, float time) {
-            return getTouchedActor().equals(secondTouch.getTouchedActor()) && Math.abs(secondTouch.getTime() - getTime()) < time;
+            if (getTouchedActor() != null && secondTouch.getTouchedActor() != null) {
+                return getTouchedActor().equals(secondTouch.getTouchedActor()) && Math.abs(secondTouch.getTime() - getTime()) < time;
+            } else {
+                return false;
+            }
         }
 
-
         public boolean isDoubleTap(Touch touch) {
             return controlIfSame(touch, TIME_BETWEEN_TAPS);
         }