Pass objptridx_t to explode_badass_object
Remove unnecessary double conversion in explode_badass_object
Detect always-invalid valptridx indexes
Use objptridx_t in obj_create
Pass objptridx_t to object_create_badass_explosion
Pass objptridx_t to object_create_explosion_sub
Use objptridx_t in object_create_debris
Remove unused return value of object_create_debris