Remove Draw3DLineTex function
Replace defines with static const variables
Code style
Use temporary variable
Used std::vector for object grouplist
Used std::vector for object linked
Remove unused object ident field
Remove function EERIE_LINKEDOBJ_Remove
Change type of parameter to size_t
Remove unnecessary function EERIE_LINKEDOBJ_InitData
Check pointers for null early
Remove function EERIE_LINKEDOBJ_Create