libmfu: fix: with dsync no longer ensured that target directory exist…

…s as before with dcmp

src/common/mfu_flist_copy.c

@@ -508,8 +508,8 @@ static int mfu_create_directory(mfu_flist list, uint64_t idx,
  }
 
  /* Skipping the destination directory ONLY if it already exists.
- * If we are doing a dsync operation it is safe to assume that
- * the destination directory already exists. The reason that
+ * If we are doing a sync operation and if the dest dir does not
+ * exist, we need to create it. The reason that
  * the dest_path and the destpath->path are compared is because
  * if we are syncing two directories we want the tree to have the
  * same number of levels. If dsync is on then only the contents of
@@ -519,8 +519,10 @@ static int mfu_create_directory(mfu_flist list, uint64_t idx,
  * not dsync is on happens prior to this in
  * mfu_param_path_copy_dest. */
 
- if ((mfu_copy_opts->do_sync) &&
- (strncmp(dest_path, destpath->path, strlen(dest_path)) == 0)) {
+ if (mfu_copy_opts->do_sync &&
+ (strncmp(dest_path, destpath->path, strlen(dest_path)) == 0) &&
+ destpath->target_stat_valid)
+ {
  mfu_free(&dest_path);
  return 0;
  }