Use pixels::get_rect in CanvasData::draw_image
Use pixels::get_rect in CanvasData::draw_image

Those functions are the same except that get_rect isn't failible, so we
have to check that the rect we want is actually in the image.

notriddle/servo,DominoTree/servo,larsbergstrom/servo,larsbergstrom/servo,splav/servo,paulrouget/servo,splav/servo,pyfisch/servo,saneyuki/servo,saneyuki/servo,paulrouget/servo,nnethercote/servo,DominoTree/servo,jimberlage/servo,szeged/servo,larsbergstrom/servo,KiChjang/servo,paulrouget/servo,KiChjang/servo,szeged/servo,jimberlage/servo,splav/servo,notriddle/servo,splav/servo,szeged/servo,nnethercote/servo,paulrouget/servo,KiChjang/servo,peterjoel/servo,pyfisch/servo,peterjoel/servo,jimberlage/servo,saneyuki/servo,jimberlage/servo,splav/servo,saneyuki/servo,notriddle/servo,szeged/servo,emilio/servo,saneyuki/servo,paulrouget/servo,saneyuki/servo,DominoTree/servo,paulrouget/servo,notriddle/servo,pyfisch/servo,larsbergstrom/servo,notriddle/servo,nnethercote/servo,KiChjang/servo,nnethercote/servo,nnethercote/servo,splav/servo,notriddle/servo,larsbergstrom/servo,jimberlage/servo,DominoTree/servo,larsbergstrom/servo,peterjoel/servo,saneyuki/servo,emilio/servo,nnethercote/servo,szeged/servo,paulrouget/servo,saneyuki/servo,KiChjang/servo,DominoTree/servo,larsbergstrom/servo,DominoTree/servo,emilio/servo,peterjoel/servo,paulrouget/servo,jimberlage/servo,KiChjang/servo,pyfisch/servo,emilio/servo,peterjoel/servo,saneyuki/servo,peterjoel/servo,pyfisch/servo,notriddle/servo,jimberlage/servo,emilio/servo,nnethercote/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,peterjoel/servo,larsbergstrom/servo,szeged/servo,DominoTree/servo,DominoTree/servo,nnethercote/servo,paulrouget/servo,KiChjang/servo,szeged/servo,peterjoel/servo,szeged/servo,szeged/servo,KiChjang/servo,emilio/servo,emilio/servo,splav/servo,pyfisch/servo,DominoTree/servo,pyfisch/servo,pyfisch/servo,jimberlage/servo,szeged/servo,emilio/servo,KiChjang/servo,nnethercote/servo,splav/servo,peterjoel/servo,splav/servo,jimberlage/servo,splav/servo,pyfisch/servo,larsbergstrom/servo,notriddle/servo,emilio/servo,larsbergstrom/servo,emilio/servo,DominoTree/servo,paulrouget/servo,pyfisch/servo,peterjoel/servo,notriddle/servo,notriddle/servo