qmp_error_response() will free the given error. Fix double-free in
later qmp_request_free().
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180705164201.9853-1-marcandre.lureau@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Fixes: 1cc37471Signed-off-by: NMarkus Armbruster <armbru@redhat.com>