Bug #5897 missing Reference in DbType setter

Description:
If you construct a MySqlParameter Object with the default constructor the
member variable paramValue does not get initialized. While the DbType property setter tries to access paramValue a System.NullReferenceException is thrown, the problem is the line with the if clause:

public DbType DbType 
  {
    ...
   set 
    { 
      if (value == paramValue.DbType) return;
      paramValue = MySqlValue.GetMySqlValueFromDbType( value );
    }
}

How to repeat:
MySqlCommand com = new MySqlCommand();
MySqlParameter param = com.CreateParameter();
param.DbType = DbType.Int16;

Suggested fix:
either initialize paramValue in the default constructor or prepend "if(paramValue!=null)"...

I just saw that in the same class you find the lines:

public MySqlDbType MySqlDbType 
{
  get  
    { 
      return paramValue.MySqlDbType;
    }
  set  
    {
      if (paramValue != null && value == paramValue.MySqlDbType) return;
      paramValue = MySqlValue.GetMySqlValue( value, false, true );
    }
}

here it was done correctly, so one just needs to copy the above line...

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