fix when percent is 0 the view isn't drawn on screen
fix when percent is 0 the view isn't drawn on screen

matibot/MBCircularProgressBar,elielr01/MBCircularProgressBar,machelix/MBCircularProgressBar,mitchellporter/MBCircularProgressBar,mjasa/MBCircularProgressBar,machelix/MBCircularProgressBar,mitchellporter/MBCircularProgressBar,arnaudWasappli/MBCircularProgressBar,elielr01/MBCircularProgressBar,arnaudWasappli/MBCircularProgressBar,mjasa/MBCircularProgressBar,matibot/MBCircularProgressBar