IQRouter: Log xml in case of processing iq answer error

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13523 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/IQRouter.java

@@ -310,7 +310,9 @@ public class IQRouter extends BasicModule {
                         iqResultListener.receivedAnswer(packet);
                     }
                     catch (Exception e) {
-                        Log.error("Error processing answer of remote entity", e);
+                        Log.error(
+                                "Error processing answer of remote entity. Answer: "
+                                        + packet.toXML(), e);
                     }
                     return;
                 }