and it's callback.
Also do not use char constants like 'NAVM' which is casting to int.
And added defautl section to switch in KX_NavMeshObject::DrawNavMesh.
- rearrange structs to work for 64bit
- define all vars before goto's
- ifdefs for qsort_r/qsort_s
- dont cast pointers to int only for NULL checks
- dont printf STR_String directly, get the char pointer from it
also minor change to gpu py module, no need to pass empty tuple to PyObject_CallObject, can just be NULL
- added possibility to add navmesh modifier manually in order to transform manually created mesh to navigation mesh (with navigation polygons data layer)
- added possibility to use existed navigation mesh object for navmesh generation (so new object won't be created, but existed object will be updated)
