[mkgmap-dev] Commit: r3137: When listing files from a directory, only list those that contain a version file.

Version mkgmap-r3137 was committed by steve on Fri, 28 Mar 2014 When listing files from a directory, only list those that contain a version file. Any empty or non-style directories would be included in the list, but would fail to open, leading to the real style being opened. Since that style would be already in the list, you get a message about a duplicate.