PostgreSQL: fix failing tests

- The BulkManipulation.UpdateMultiplePropertyOnAnimal and BulkManipulation.UpdateOnAnimal tests were using Double parameter types to update the Single column. It seems that now Npgsql calculates parameter types according to the columns they touches and fails to set the parameters in this case.
- The CriteriaQueryTest.TestSubcriteriaBeingNull were using the Int32 parameter type instead of expected Double.

Author: hazzik

src/NHibernate.Test/Criteria/CriteriaQueryTest.cs

@@ -143,7 +143,7 @@ public void TestSubcriteriaBeingNull()
 
 			DetachedCriteria criteria = DetachedCriteria.For<Course>("c");
 			criteria.SetProjection(Projections.Count("id"));
-			criteria.Add(Expression.Or(Subqueries.Le(5, subcriteria), Subqueries.IsNull(subcriteria)));
+			criteria.Add(Expression.Or(Subqueries.Le(5D, subcriteria), Subqueries.IsNull(subcriteria)));
 
 			object o = criteria.GetExecutableCriteria(session).UniqueResult();
 			Assert.AreEqual(1, o);

src/NHibernate.Test/Hql/Ast/BulkManipulation.cs

@@ -619,8 +619,8 @@ public void UpdateOnAnimal()
 
 			count =
 				s.CreateQuery("update Animal set bodyWeight = bodyWeight + :w1 + :w2")
-				.SetDouble("w1", 1)
-				.SetDouble("w2", 2)
+				.SetSingle("w1", 1)
+				.SetSingle("w2", 2)
 				.ExecuteUpdate();
 			Assert.That(count, Is.EqualTo(6), "incorrect count on 'complex' update assignment");
 
@@ -649,7 +649,7 @@ public void UpdateMultiplePropertyOnAnimal()
 					s.CreateQuery("update Animal set description = :newDesc, bodyWeight = :w1 where description = :desc")
 						.SetString("desc", data.Polliwog.Description)
 						.SetString("newDesc", "Tadpole")
-						.SetDouble("w1", 3)
+						.SetSingle("w1", 3)
 						.ExecuteUpdate();
 
 				Assert.That(count, Is.EqualTo(1));