qemuDomainGetStats: Copy domain ID too

One of the problems with our virGetDomain function is that it
copies just domain name and domain UUID. Therefore it's very
easy to forget aboud domain ID. This can cause some bugs, like
virConnectGetAllDomainStats not reporting proper domain IDs.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_driver.c

@@ -19556,6 +19556,9 @@ qemuDomainGetStats(virConnectPtr conn,
     if (!(tmp->dom = virGetDomain(conn, dom->def->name, dom->def->uuid)))
         goto cleanup;
 
+    /* We have to copy the domain ID by hand */
+    tmp->dom->id = dom->def->id;
+
     *record = tmp;
     tmp = NULL;
     ret = 0;