Request a chunk of a log

                target_system             : System ID (uint8_t)
                target_component          : Component ID (uint8_t)
                id                        : Log id (from LOG_ENTRY reply) (uint16_t)
                ofs                       : Offset into the log (uint32_t)
                count                     : Number of bytes (uint32_t)

def log_request_data_encode(self, target_system, target_component, id, ofs, count):
                '''
                Request a chunk of a log

                target_system             : System ID (uint8_t)
                target_component          : Component ID (uint8_t)
                id                        : Log id (from LOG_ENTRY reply) (uint16_t)
                ofs                       : Offset into the log (uint32_t)
                count                     : Number of bytes (uint32_t)

                '''
                return MAVLink_log_request_data_message(target_system, target_component, id, ofs, count)