This was flipped in b5e264b.
Infering the type from the right-hand side is tempting here, but the
right-hand side if often a constant, which gets a bit funky in C.
Consider:
assert(lfs->cfg->read != NULL);
gcc: warning: ISO C forbids initialization between function pointer
and ‘void *’ [-Wpedantic]
assert(err < 0ULL);
gcc: warning: comparison of unsigned expression in ‘< 0’ is always
false [-Wtype-limits]
Prefering the left-hand type should hopefully avoid these issues most of
the time.
eeab0c41e8