fix capabilities detection for postgres >=8.4

git-svn-id: http://svn.osgeo.org/qgis/trunk@14738 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: jef

src/providers/postgres/qgspostgresprovider.cpp

@@ -993,7 +993,7 @@ bool QgsPostgresProvider::hasSufficientPermsAndCapabilities()
                      "current_schema()" )
             .arg( quotedValue( mQuery ) )
             .arg( geometryColumn.isNull()
-                  ? QString( "" )
+                  ? QString( "'f'," )
                   : QString( "has_column_privilege(%1,%2,'UPDATE')," )
                   .arg( quotedValue( mQuery ) )
                   .arg( quotedValue( geometryColumn ) )