This fixes a crasher I found over the weekend where DirectoryMonitor would assert if a directory was created and renamed or deleted before the monitor was notified of the creation.
This fixes a crasher I found over the weekend where DirectoryMonitor would assert if a directory was created and renamed or deleted before the monitor was notified of the creation.


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