AccountManager: Don't fallback to disco#info if not authenticated

smack-extensions/src/main/java/org/jivesoftware/smackx/iqregister/AccountManager.java

@@ -340,9 +340,15 @@ public final class AccountManager extends Manager {
             return true;
         }
 
+        // Fallback to disco#info only if this connection is authenticated, as otherwise we won't have an full JID and
+        // won't be able to do IQs.
+        if (connection.isAuthenticated()) {
             return ServiceDiscoveryManager.getInstanceFor(connection).serverSupportsFeature(Registration.NAMESPACE);
         }
 
+        return false;
+    }
+
     /**
      * Gets the account registration info from the server.
      * @throws XMPPErrorException