Undo the unintended changes in svn r5978 which disabled postgres support

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5980 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/gui/qgisapp.cpp

@@ -140,11 +140,6 @@
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
-//short term hack by Tim for windows to disable postgresql support
-//#ifndef WIN32
-#undef HAVE_POSTGRESQL
-//#endif
-
 #ifdef HAVE_POSTGRESQL
 #include "qgsdbsourceselect.h"
 #endif