This fixes #3226 by correcting a minor typo in paint_sprockets() - the extra sprocket hole for the straggler pixels was accidentally being drawn on the left twice. 
This fixes #3226 by correcting a minor typo in paint_sprockets() - the extra sprocket hole for the straggler pixels was accidentally being drawn on the left twice. 


abrauchli/shotwell,ritchiewilson/shotwell,damianmoore/shotwell,h4ck3rm1k3/shotwell,h4ck3rm1k3/shotwell,polymeris/shotwell,jof/shotwell,Sanva/shotwell-gsoc,damianmoore/shotwell,abrauchli/shotwell,jof/shotwell,polymeris/shotwell,abrauchli/shotwell,ritchiewilson/shotwell,Sanva/shotwell-gsoc,jimbonator/shotwell,jimbonator/shotwell,damianmoore/shotwell,polymeris/shotwell,jimbonator/shotwell,jof/shotwell,ritchiewilson/shotwell,h4ck3rm1k3/shotwell,Sanva/shotwell-gsoc