Pointer to cs_detail.
NOTE: detail pointer is only valid when both requirements below are met:
(1) CS_OP_DETAIL = CS_OPT_ON
(2) Engine is not in Skipdata mode (CS_OP_SKIPDATA option set to CS_OPT_ON)
NOTE 2: when in Skipdata mode, or when detail mode is OFF, even if this pointer
is not NULL, its content is still irrelevant.
Pointer to cs_detail. NOTE: detail pointer is only valid when both requirements below are met: (1) CS_OP_DETAIL = CS_OPT_ON (2) Engine is not in Skipdata mode (CS_OP_SKIPDATA option set to CS_OPT_ON)
NOTE 2: when in Skipdata mode, or when detail mode is OFF, even if this pointer is not NULL, its content is still irrelevant.