modbus_send_raw_request(), const correctness

[franzhollerer]

Can you please change the function signature for modbus_send_raw_request() from

MODBUS_API int modbus_send_raw_request(modbus_t *ctx, uint8_t *raw_req, int raw_req_length);

to

MODBUS_API int modbus_send_raw_request(modbus_t *ctx, const uint8_t *raw_req, int raw_req_length);

The function does not change the content of the passed buffe raw_reqr, therefore it should be const qualified.

[stephane]

Agree. Done.
Thank you