Fix one-level deep recursion when building the tree of the current directory.
Fix one-level deep recursion when building the tree of the current directory.

Coursemology/coursemology.org,Coursemology/coursemology.org,allenwq/coursemology.org,nnamon/coursemology.org,nusedutech/coursemology.org,Coursemology/coursemology.org,dariusf/coursemology.org,nusedutech/coursemology.org,dariusf/coursemology.org,dariusf/coursemology.org,nnamon/coursemology.org,dariusf/coursemology.org,dariusf/coursemology.org,Coursemology/coursemology.org,allenwq/coursemology.org,nusedutech/coursemology.org,nusedutech/coursemology.org,allenwq/coursemology.org,nnamon/coursemology.org,nusedutech/coursemology.org,allenwq/coursemology.org,nnamon/coursemology.org,Coursemology/coursemology.org,nnamon/coursemology.org,allenwq/coursemology.org