Added constructors to LocalMessageIU.

ipaacalib/java/src/ipaaca/LocalMessageIU.java

 package ipaaca;
 
+
 /**
  * Local IU of Message sub-type. Can be handled like a normal IU, but on the remote side it is only existent during the handler calls.
  * @author hvanwelbergen
@@ -7,4 +8,14 @@ package ipaaca;
 public class LocalMessageIU extends LocalIU
 {
 
+    public LocalMessageIU()
+    {
+        super();
+    }
+
+    public LocalMessageIU(String category)
+    {
+        super(category);
+    }
+
 }