ext4: fix type declaration of ext4_validate_block_bitmap

The block_group parameter to ext4_validate_block_bitmap is both used
as a ext4_group_t inside the function and the same type is passed in
by all callers.  We might as well use the typedef consistently instead
of open-coding the 'unsigned int'.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 2889665..2e58182 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1930,7 +1930,7 @@
 
 extern void ext4_validate_block_bitmap(struct super_block *sb,
 				       struct ext4_group_desc *desc,
-				       unsigned int block_group,
+				       ext4_group_t block_group,
 				       struct buffer_head *bh);
 extern unsigned int ext4_block_group(struct super_block *sb,
 			ext4_fsblk_t blocknr);