Fix apparent copy pasta of the total/len in recv.

src/sbbs3/js_socket.c

@@ -339,7 +339,7 @@ static ptrdiff_t js_socket_recv(JSContext *cx, js_socket_private_t *p, void *buf
 		total += ret;
 		if ((!(flags & MSG_WAITALL)) || p->nonblocking)
 			return total;
-		if(total>=(ptrdiff_t)len)
+		if(ret>=(ptrdiff_t)len)
 			return total;
 		len-=ret;
 		buf=((uint8_t *)buf) + ret;