[PATCH 13x only] FileInfo -> lyx::FileInfo

[Angus Leeming]

Jean-Marc,

Andreas reports that
        #include <CoreServices/CoreServices.h>
which is needed to compile the code below to ascertain the user_lyxdir on
the Mac
        FSRef fsref;
        OSErr const error_code =
                FSFindFolder(kUserDomain, kApplicationSupportFolderType,
                             kDontCreateFolder, &fsref);
        if (error_code != 0)
                return string();

        char application_support[PATH_MAX + 1];
        OSStatus const status_code =
                FSRefMakePath(&fsref, application_support, PATH_MAX);
        if (status_code != 0)
                return string();

        return AddPath(application_support, PACKAGE);

pulls in a type 'FileInfo' that clashes with our own FileInfo class.

There's no problem in the 1.4.x tree, because our class is hidden away:
        namespace lyx {
            namespace support {
                class FileInfo;
            } // namespace support
        } namespace lyx

I think that's overkill for the 1.3.x tree, but I do propose moving
FileInfo into namespace lyx.

Patch attached. Ok?

-- 
Angus

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