qemu-pr-helper: Actually allow users to specify pidfile
Due to wrong specification of arguments to getopt_long() any attempt to set pidfile resulted in: 1) the default to be leaked 2) the @pidfile variable to be set to NULL (because optarg is NULL without this patch). Signed-off-by: NMichal Privoznik <mprivozn@redhat.com> Message-Id: <6f10cd53d361a395aa0e85a9311ec4e9a8fc11e5.1521868451.git.mprivozn@redhat.com> Cc: qemu-stable@nongnu.org Reviewed-by: NEric Blake <eblake@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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