catalyst_api: handle the last path entry in the envvar

The last path entry is terminated by pathsep getting to the end of the string which leaves the loop without checking if curpath has been handled.

Fixes: #10 (closed)

requested review from @utkarsh.ayachit

Warnings:

• please consider adding a changelog entry in a file ending with .md in Documentation/release/dev.

The warnings do not need to be fixed, but it is recommended to do so.

Must say, I wish C had more useful string manipulation facilities :/ .

Do: merge

resolved all threads

merged

mentioned in commit 16dc3698