erofs-utils: correct the only tail-end data comment in __allocate_inode_bh_data()

nblocks = 0 means only tail-end data which may be inlined or not(ENOSPC).
Acturally, we also observed this non-inline tail-end data case.

Link: https://lore.kernel.org/r/20210616080112.941-1-zbestahu@gmail.com
Reviewed-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Gao Xiang <xiang@kernel.org>
1 file changed