Fix for bug where the first row was not classified in unique value di…

…alog

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@7234 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/app/qgsuniquevaluedialog.cpp

@@ -123,7 +123,7 @@ void QgsUniqueValueDialog::apply()
     if (provider)
       {
 	int fieldIndex = provider->indexFromFieldName(mClassificationComboBox->currentText());
-	if(fieldIndex > 0)
+	if(fieldIndex != -1)
 	  {
 	    renderer->setClassificationField(fieldIndex);
 	    mVectorLayer->setRenderer(renderer);