D12490: concatPaths: process empty path1 correctly

[Алексей Шилин]

aleksejshilin created this revision.
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REVISION SUMMARY
  When path1 was empty (i.e. 'current directory'), concatPaths() used to
  return an absolute path /path2 instead of just path2, which broke e.g.
  KUrlCompletion in certain cases.
  
  This commit makes concatPaths() return just path2 if path1 is empty.

REPOSITORY
  R241 KIO

BRANCH
  fix_concatPaths

REVISION DETAIL
  https://phabricator.kde.org/D12490

AFFECTED FILES
  src/pathhelpers_p.h

To: aleksejshilin, #frameworks
Cc: michaelh, bruns
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