e17/evry-files: fix segv when one uses parent directories command while current dir is still scanning
e17/evry-files: fix segv when one uses parent directories command while current dir is still scanning


SVN revision: 62522

tizenorg/platform.upstream.enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,rvandegrift/e,tasn/enlightenment,FlorentRevest/Enlightenment