vz: don't fail query domain info in case we don't have valid stats handle

Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

src/vz/vz_driver.c

@@ -600,6 +600,7 @@ static int
 vzDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
 {
     virDomainObjPtr dom;
+    vzDomObjPtr privdom;
     int ret = -1;
 
     if (!(dom = vzDomObjFromDomainRef(domain)))
@@ -611,13 +612,12 @@ vzDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
     info->nrVirtCpu = virDomainDefGetVcpus(dom->def);
     info->cpuTime = 0;
 
-    if (virDomainObjIsActive(dom)) {
+    privdom = dom->privateData;
+
+    if (PRL_INVALID_HANDLE != privdom->stats && virDomainObjIsActive(dom)) {
         unsigned long long vtime;
-        vzDomObjPtr privdom;
         size_t i;
 
-        privdom = dom->privateData;
-
         for (i = 0; i < virDomainDefGetVcpus(dom->def); ++i) {
             if (prlsdkGetVcpuStats(privdom->stats, i, &vtime) < 0) {
                 virReportError(VIR_ERR_OPERATION_FAILED, "%s",