call alarm() prior to processing a file, so the extractor dies if it gets

2009-02-24  Carlos Garnacho  <carlos@imendio.com>

        * src/tracker-extract/tracker-extract.c:
        * src/tracker-extract/tracker-main.c: call alarm() prior to processing
        a file, so the extractor dies if it gets stuck.

svn path=/trunk/; revision=2963