Squashfs: remove redundant length initialisation in squashfs_readdir

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/fs/squashfs/dir.c b/fs/squashfs/dir.c
index 4a812bfc..7142a6f 100644
--- a/fs/squashfs/dir.c
+++ b/fs/squashfs/dir.c
@@ -105,7 +105,7 @@
 	struct inode *inode = file->f_dentry->d_inode;
 	struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
 	u64 block = squashfs_i(inode)->start + msblk->directory_table;
-	int offset = squashfs_i(inode)->offset, length = 0, dir_count, size,
+	int offset = squashfs_i(inode)->offset, length, dir_count, size,
 				type, err;
 	unsigned int inode_number;
 	struct squashfs_dir_header dirh;