char	*ft_strstr(char *str, char *to_find)
{
	unsigned int pos;
	unsigned int i;

	if (!to_find)
		return (str);
	pos = 0;
	while (str[pos] != '\0')
	{
		if (str[pos] == to_find[0])
		{
			i = 1;
			while (to_find[i] != '\0' && str[pos + i] == to_find[i])
				++i;
			if (to_find[i] == '\0')
				return (&str[pos]);
		}
		++pos;
	}
	return (0);
}