ceph: fix sizeof(struct tYpO *) typo

struct ceph_xattr -> struct ceph_inode_xattr
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>

fs/ceph/xattr.c

@@ -592,7 +592,7 @@ static int __build_xattrs(struct inode *inode)
 		xattr_version = ci->i_xattrs.version;
 		spin_unlock(&ci->i_ceph_lock);
 
-		xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
+		xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *),
 				 GFP_NOFS);
 		err = -ENOMEM;
 		if (!xattrs)