File kill-lockfile.patch of Package deja-dup.1019

--- a/libdeja/tools/duplicity/DuplicityInstance.vala
+++ b/libdeja/tools/duplicity/DuplicityInstance.vala
@@ -176,6 +176,12 @@
     foreach(string a in argv)
       real_argv[i++] = a;
     
+    // Kill any lockfile, since our cancel methods may leave them around.
+    // We already are pretty sure we don't have other duplicities in our
+    // archive directories, because we use our own and we ensure we only have
+    // one deja-dup running at a time via DBus.
+    Posix.system("/bin/rm -f " + Shell.quote(cache_dir) + "/*/lockfile.lock");
+
     Process.spawn_async_with_pipes(null, real_argv, real_envp,
                         SpawnFlags.SEARCH_PATH |
                         SpawnFlags.DO_NOT_REAP_CHILD |