Fix a compile error

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@9107 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: gjm

src/app/qgsvectorlayerproperties.cpp

@@ -36,6 +36,7 @@
 #include "qgsvectorlayer.h"
 #include "qgsvectorlayerproperties.h"
 #include "qgsconfig.h"
+#include "qgsvectordataprovider.h"
 
 #ifdef HAVE_POSTGRESQL
 #include "qgspgquerybuilder.h"