if (count == 0) { return NULL; }
get_array_from_list(  nssList *certList,  NSSCertificate *rvOpt[],  PRUint32 maximumOpt,  NSSArena *arenaOpt){    PRUint32 count;    NSSCertificate **rvArray = NULL;    count = nssList_Count(certList);    if (maximumOpt > 0) {	count = PR_MIN(maximumOpt, count);    }    if (rvOpt) {	nssList_GetArray(certList, (void **)rvOpt, count);    } else {	rvArray = nss_ZNEWARRAY(arenaOpt, NSSCertificate *, count + 1);	if (rvArray) {	    nssList_GetArray(certList, (void **)rvArray, count);	}    }    return rvArray;}