Fix TKOpenGL "delete void*" warnings

// Note : file inc/OpenGl_tsm.hxx

// New base struct, to define new/delete operators only once
typedef struct BASE_TSM_ELEM_DATA_STRUCT
{
  IMPLEMENT_MEMORY_OPERATORS
} BASE_TSM_ELEM_DATA, *base_tsm_elem_data;

typedef  union  TSM_ELEM_DATA_UNION
{
  BASE_TSM_ELEM_DATA      *pdata; // Was "void* pdata;"
  Tint       ldata;
} TSM_ELEM_DATA, *tsm_elem_data;

typedef  struct  TSM_ELEM_STRUCT : public BASE_TSM_ELEM_DATA_STRUCT // New inheritance
{
  TelType        el;
  TSM_ELEM_DATA  data;
  // Removed "IMPLEMENT_MEMORY_OPERATORS"
} TSM_ELEM, *tsm_elem;

// ...