MsSqlCe dialect doesn't give the correct SQL type for Decimal with Scale defined

In src/NHibernate/Dialect/MsSqlCeDialect.cs, the Decimal type is registered like this:

RegisterColumnType(DbType.Decimal, 19, "NUMERIC(19, $1)");

So the "Scale" part of the type is replaced by the "Length" property. It should take the "Scale" property by defining the parameter as $s, like it is done in the SQL Server dialects for instance.

RegisterColumnType(DbType.Decimal, 19, "NUMERIC(19, $s)");

So calling dialect.GetTypeName(new SqlType(DbType.Decimal, 19, 9) should return NUMERIC(19, 9) and not NUMERIC(19, 0") which is worse than not specifying a scale at all.