picamera: fix for python2. Closes #5698
picamera: fix for python2. Closes #5698

LogicalDash/kivy,inclement/kivy,rnixx/kivy,matham/kivy,rnixx/kivy,akshayaurora/kivy,LogicalDash/kivy,LogicalDash/kivy,akshayaurora/kivy,kivy/kivy,kivy/kivy,matham/kivy,inclement/kivy,akshayaurora/kivy,matham/kivy,matham/kivy,LogicalDash/kivy,inclement/kivy,rnixx/kivy,kivy/kivy