ztex: Workaround duplicate share submissions by doubling "backlog" size

driver-ztex.c

@@ -188,6 +188,7 @@ static uint64_t ztex_scanhash(struct thr_info *thr, struct work *work,
 	memset(lastnonce, 0, sizeof(uint32_t)*ztex->numNonces);
 	
 	backlog_max = ztex->numNonces * (1 + ztex->extraSolutions);
+	backlog_max *= 2;
 	backlog = malloc(sizeof(uint32_t) * backlog_max);
 	if (backlog == NULL) {
 		applog(LOG_ERR, "%s: failed to allocate backlog[%d]", ztex->repr, backlog_max);