Fix bogus "Sources not available" for single files
Fix bogus "Sources not available" for single files

Even though files are now allowed and understood everywhere for source
code extraction (UI as well as extractors), the code for detecting if
source code is present still incorrectly expected directories.

PKRoma/poedit,egoitzro/poedit,BenKeyFSI/poedit,alexhenrie/poedit,dwaynebailey/poedit,BenKeyFSI/poedit,dwaynebailey/poedit,c72578/poedit,huoxudong125/poedit,huoxudong125/poedit,alexhenrie/poedit,dwaynebailey/poedit,nawawi/poedit,BenKeyFSI/poedit,egoitzro/poedit,alexhenrie/poedit,egoitzro/poedit,dwaynebailey/poedit,vslavik/poedit,c72578/poedit,vslavik/poedit,vslavik/poedit,egoitzro/poedit,vslavik/poedit,egoitzro/poedit,BenKeyFSI/poedit,huoxudong125/poedit,PKRoma/poedit,dwaynebailey/poedit,alexhenrie/poedit,vslavik/poedit,nawawi/poedit,nawawi/poedit,c72578/poedit,huoxudong125/poedit,BenKeyFSI/poedit,huoxudong125/poedit,nawawi/poedit,c72578/poedit,PKRoma/poedit,PKRoma/poedit,alexhenrie/poedit,PKRoma/poedit,c72578/poedit,nawawi/poedit