Fixes #2202 ("soft assertion: gtk_tree_path_compare: assertion `b != NULL' failed").
Fixes #2202 ("soft assertion: gtk_tree_path_compare: assertion `b != NULL' failed").


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