ocfs: fix ocfs2_xattr_user_get() argument name

 * 'user' attributes support

 */

static int ocfs2_xattr_user_get(const struct xattr_handler *handler,

				struct dentry *unusde, struct inode *inode,

				struct dentry *unused, struct inode *inode,

				const char *name, void *buffer, size_t size)

{

	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);