Comment 1 for bug 1739885

Traceback (most recent call last):
  File "/usr/bin/gtk-recordmydesktop", line 43, in <module>
    main()
  File "/usr/bin/gtk-recordmydesktop", line 40, in main
    tr=rmdSimple.simpleWidget()
  File "/usr/lib/python2.7/dist-packages/recordMyDesktop/rmdSimple.py", line 509, in __init__
    self.__subWidgets__()
  File "/usr/lib/python2.7/dist-packages/recordMyDesktop/rmdSimple.py", line 88, in __subWidgets__
    self.image=sT.GtkThumbSelector(self,self.values[5],self.hidden,2000)
  File "/usr/lib/python2.7/dist-packages/recordMyDesktop/rmdSelectThumb.py", line 69, in __init__
    self.__subsample__(sroot,self.wwidth,self.wheight,self.root,self.factor)
  File "/usr/lib/python2.7/dist-packages/recordMyDesktop/rmdSelectThumb.py", line 79, in __subsample__
    im2.put_pixel(k/stride,i/stride,im1.get_pixel(k,i))
AttributeError: 'NoneType' object has no attribute 'get_pixel'