ext4: fix condition of validate s_first_meta_bg

Fixes: ext4: validate s_first_meta_bg at mount time (6efa0d2da78a1afd0b05201a37d8e5e4e0d49683)

Change-Id: Iea0fb0df71502c5578c3c96e992d6cc78842ca7e
1 file changed