Fixes the typo found in a warning message of a persistent object
allocator function.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
        bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
        if (!nilfs_clear_bit_atomic(nilfs_mdt_bgl_lock(inode, group),
                                    group_offset, bitmap))
-               printk(KERN_WARNING "%s: entry numer %llu already freed\n",
+               printk(KERN_WARNING "%s: entry number %llu already freed\n",
                       __func__, (unsigned long long)req->pr_entry_nr);
 
        nilfs_palloc_group_desc_add_entries(inode, group, desc, 1);