fix(os-final proj4-CPU): rectify split function redundance
fix(os-final proj4-CPU): rectify split function redundance

fix sabertazimi/hust-os-2017#11
issue sabertazimi/hust-os-2017#5
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