ext4: Use simple_strtol() instead of simple_strtoul() in ext4_ui_proc_open

static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf,

			       size_t cnt, loff_t *ppos)

{

	unsigned int *p = PDE(file->f_path.dentry->d_inode)->data;

	unsigned long *p = PDE(file->f_path.dentry->d_inode)->data;

	char str[32];

	unsigned long value;

	if (cnt >= sizeof(str))

		return -EINVAL;

	if (copy_from_user(str, buf, cnt))

		return -EFAULT;

	value = simple_strtol(str, NULL, 0);

	if (value < 0)

		return -ERANGE;

	*p = value;

	*p = simple_strtoul(str, NULL, 0);

	return cnt;

}