ref: 23f3d33cdbbfdf2f169f1d7c4acf1f947ed5f5c5
dir: /sys/src/ape/lib/ap/gen/calloc.c/
#include <stdlib.h>
#include <string.h>
void *
calloc(size_t nmemb, size_t size)
{
void *mp;
nmemb = nmemb*size;
if(mp = malloc(nmemb))
memset(mp, 0, nmemb);
return(mp);
}