libext2fs: replace missing flexbg initialization in flexbg_offset

Commit 25567a7b0fa9 accidentally removed the initialization for flexbg
and flexbg_size, which affected ext2fs_allocate_group_table() and
ext2fs_allocate_tables().   Replace them.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
1 file changed