Fixes: Coverity CID 1546884
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
(cherry picked from commit 586ac2c67d707c2588766c5195d94fa553cc25af)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>