_dl_reallocarray
vec->vec = _dl_reallocarray(vec->vec, vec->alloc, sizeof(*vec->vec));
liblist = _dl_reallocarray(NULL, libcount,
randomlist = _dl_reallocarray(NULL, libcount,
retval = _dl_reallocarray(NULL, count, sizeof(*retval));
void *_dl_reallocarray(void *, size_t nmemb, size_t size);