fsck.f2fs: fix corrupted dentries
fsck.f2fs: fix corrupted dentries

This patch fixes corrupted dentries such as name_len == 0.

Signed-off-by: Jaegeuk Kim <71255387a32c360dfbe6dfb7aaeb123bf1dc8cb6@kernel.org>

seamlik/f2fs-tools,TurboROM/external_f2fs-tools,seamlik/f2fs-tools,TurboROM/external_f2fs-tools