Better m_message_type handling
Better m_message_type handling

Handling cases MESSAGE_TYPE_PROGRESS_VALUE and MESSAGE_TYPE_PROGRESS_TEXT to not lose m_progress_value and m_progress_text.
This may not be perfect, but it is an improvement.
berndhahnebach/IfcPlusPlus,berndhahnebach/IfcPlusPlus,ifcquery/ifcplusplus