grx@grxmint ~ $ gcc wut.c
wut.c: In function ‘main’:
wut.c:18:3: warning: passing argument 1 of ‘s.cb’ from incompatible pointer type [enabled by default]
   s.cb (&s);
   ^
wut.c:18:3: note: expected ‘struct struct_t *’ but argument is of type ‘struct struct_t *’

ah oui

bon je finis mon coup de fil, puis je regarde ^^