f2fs: code cleanup for f2fs_statfs_project()

Calling min_not_zero() to simplify complicated prjquota
limit comparison in f2fs_statfs_project().

Signed-off-by: Chengguang Xu <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
1 file changed