OracleGenerator "GenerateConstraints" creates null parameters for "IS NULL" constraints

[stackwave]

At the top of OracleGenerator.GenerateConstraints, a parameter is created for every constraint. However, if the constraint is an "IS NULL" constraint, the correct syntax is appended to the query string, but the parameter is kept around with a null value. When the command is then prepared and executed, Oracle throws error ORA-01036, "illegal variable name/number." I've fixed this on my end by checking for null before adding parameters in SqlQuery.SetConstraintParams. What used to be

else
    cmd.Parameters.Add(c.ParameterName, c.ParameterValue, c.DbType);

is now

else
{
    if (c.ParameterValue != null)
    {
        cmd.Parameters.Add(c.ParameterName, c.ParameterValue, c.DbType);
    }
}