nilfs2: remove spaces before tabs

This kills the following checkpatch warnings:

 WARNING: please, no space before tabs
 #74: FILE: segment.h:74:
 +^Iunsigned ^I^Iflags;$

 WARNING: please, no space before tabs
 #35: FILE: segbuf.c:35:
 +^Iint ^I^I^Istart, end; /* The region to be submitted */$

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 2a79456..82dfd6a 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -71,7 +71,7 @@
  */
 struct nilfs_cstage {
 	int			scnt;
-	unsigned 		flags;
+	unsigned		flags;
 	struct nilfs_inode_info *dirty_file_ptr;
 	struct nilfs_inode_info *gc_inode_ptr;
 };