Return value of a function 'virDomainChrDefNew' is dereferenced
at hyperv_driver.c without checking for NULL, which can lead to
NULL dereference immediatly after.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Oleg Sviridov <oleg.sviridov@red-soft.ru>
---
 src/hyperv/hyperv_driver.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)