Directory count not correct with -d flag

[ncw]

$ tree /tmp/dir
/tmp/dir
├── file1
├── file2
├── file3
└── subdir
    ├── file4
    └── file5

1 directories, 5 files

but with -d gives the wrong footer line

$ tree -d /tmp/dir
/tmp/dir
└── subdir

0 directories

I spent 5 minutes trying to fix this but I couldn't see the problem!

[a8m]

thanks for the reporting. fixed in #6 😃