Currently, if we fail to open the specified log file (generally due to a
permissions issue), we'll assign NULL to the logfile handle (stderr,
initially) used by the logging routines, which can cause a segfault to
occur when we attempt to report the error before exiting.
Instead, only re-assign if the open() was successful.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>