Re: compile errors

["George M. Garner Jr." <ggarner_online@xxxxxxxxxxxxxxxxx>]

When I compile libssh 7.5 with the VS2015 compiler I get the following 
two warnings:

fe25519.c(92):
warning C4146: unary minus operator applied to unsigned type, result 
still unsigned

fe25519.c(145): warning C4146: unary minus operator applied to unsigned 
type, result still unsigned

The two lines of code are:


m = -m;

and

mask = -mask;

where both m and mask are defined as crypto_uint32.  What is the 
intended result of apply a unary minus operator to the unsigned types?

m = (uint32_t) ( -(int32_t)m);


Regards,

George M. Garner Jr.