fix(os-final proj5-path2arr): recitfy empty element
fix(os-final proj5-path2arr): recitfy empty element

fix sabertazimi/hust-os-2017#15
issue sabertazimi/hust-os-2017#6
issue sabertazimi/awesome-notes#27

sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab,sabertazimi/hust-lab