--- a/QTfrontend/hats.cpp	Mon Dec 27 23:57:44 2010 +0100
+++ b/QTfrontend/hats.cpp	Tue Jan 04 12:53:46 2011 +0100
@@ -77,6 +77,10 @@
 QVariant HatsModel::headerData(int section,
             Qt::Orientation orientation, int role) const
 {
+    Q_UNUSED(section);
+    Q_UNUSED(orientation);
+    Q_UNUSED(role);
+
     return QVariant();
 }