Re: sources: fix handling of non-existent include files (issue 547700043 by hanwenn@gmail.com)

[hanwenn]

i have this now:

commit d8aaab93d8c640dc6343c3dfdcf177778e69ccc6 (HEAD -> not-found)
Author: Han-Wen Nienhuys <han...@lilypond.org>
Date:   Fri Feb 28 19:03:23 2020 +0100

    sources: fix handling of non-existent include files
    
    The following commit caused String::String to be called with a null
    pointer:
    
      commit 6663fd3fd00083c5b75d988fd0ebfb77e4c01d0e
      Author: Han-Wen Nienhuys <han...@lilypond.org>
      Date:   Sat Jan 25 13:08:27 2020 +0100
    
          Clean up and document include file searching



https://codereview.appspot.com/547700043/