PGSQL fixed a missing cast to uuid in XInventoryData

Signed-off-by: Melanie Thielker <melanie@t-data.com>

OpenSim/Data/PGSQL/PGSQLXInventoryData.cs

@@ -205,7 +205,7 @@ namespace OpenSim.Data.PGSQL
 */
                     cmd.CommandText = String.Format(@"select bit_or(""inventoryCurrentPermissions"") as ""inventoryCurrentPermissions"" 
                                  from inventoryitems 
-                                 where ""avatarID"" = :PrincipalID 
+                                 where ""avatarID""::uuid = :PrincipalID
                                    and ""assetID"" = :AssetID 
                                  group by ""assetID"" ");