Fix another unintended change in r5978 that also disabled postgres

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5981 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/gui/qgsvectorlayerproperties.cpp

@@ -28,11 +28,6 @@
 #include "qgsuniquevaluedialog.h"
 #include "qgsvectordataprovider.h"
 #include "qgsvectorlayer.h"
-
-#ifdef WIN32
-//temporary hack by Tim to disable pg on windows
-#undef HAVE_POSTGRESQL
-#endif
 #ifdef HAVE_POSTGRESQL
 #include "qgspgquerybuilder.h"
 #include "../providers/postgres/qgspostgresprovider.h"