Fixed AS3 - extra newlines on methods which use activation

Fixed #2162 AS3 switch inside foreach

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/model/StoreNewActivationAVM2Item.java

@@ -65,5 +65,9 @@ public class StoreNewActivationAVM2Item extends AVM2Item {
     public GraphTargetItem returnType() {
         return TypeItem.UNBOUNDED;
     }
-    
+
+    @Override
+    public boolean isEmpty() {
+        return true;
+    }            
 }