[Libguestfs] [PATCH x 3] Three small fixes for Debian

These small fixes are required to fix the build and tests on Debian (using the debootstrap/debirf appliance). There is currently another bug in the Debian tests which I'm looking into. hexdump always fails as follows: libguestfs: error: hexdump: hexdump: /test123: hexdump: /sysroot/test123: Bad file descriptor Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones New in Fedora 11: Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 70 libraries supprt'd http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw