char    *ft_strncat(char *dest, char *src, unsigned int nb)
{
    unsigned int size;
    unsigned int i;

    size = 0;
    while (dest[size])
    {
        size++;
    }
    i = 0;
    while (src[i] && i < nb)
    {
        dest[size + i] = src[i];
        i++;
    }
    dest[size + i] = '\0';
    return (dest);
}