Fix SplitPaths when pruning non-existent directories.
Fix SplitPaths when pruning non-existent directories.

marsupial/cling,marsupial/cling,root-mirror/cling,marsupial/cling,karies/cling,karies/cling,karies/cling,marsupial/cling,marsupial/cling,karies/cling,karies/cling,root-mirror/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,root-mirror/cling,root-mirror/cling,karies/cling