! (0 <= stage1 && stage1 <= 3) ||
sscanf(av[2], "%d", &stage2) != 1 ||
! (0 <= stage2 && stage2 <= 3) ||
- find_copies_harder && detect_rename != DIFF_DETECT_COPY)
+ (find_copies_harder && detect_rename != DIFF_DETECT_COPY))
usage(diff_stages_usage);
av += 3; /* The rest from av[0] are for paths restriction. */