domain_conf.c: skip checking ZPCI address is incomplete if not present

Commit 07659100 ("conf: fix zPCI address auto-generation on
s390") is doing a check for virZPCIDeviceAddressIsIncomplete()
prior to checking if the device has a ZPCI address at all. This
results in errors like these when starting libvirt:

  error : virDomainDeviceInfoFormat:7527 : internal error:
  Missing uid or fid attribute of zPCI address

Fix it by moving virZPCIDeviceAddressIsIncomplete() after the
check done by virZPCIDeviceAddressIsPresent().

Fixes: 07659100Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

src/conf/domain_conf.c

@@ -7522,11 +7522,11 @@ virDomainDeviceInfoFormat(virBufferPtr buf,
                               virTristateSwitchTypeToString(info->addr.pci.multi));
         }
 
-        if (virZPCIDeviceAddressIsIncomplete(&info->addr.pci.zpci)) {
+        if (virZPCIDeviceAddressIsPresent(&info->addr.pci.zpci)) {
+            if (virZPCIDeviceAddressIsIncomplete(&info->addr.pci.zpci))
                 virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                                _("Missing uid or fid attribute of zPCI address"));
-        }
-        if (virZPCIDeviceAddressIsPresent(&info->addr.pci.zpci)) {
+
             virBufferAsprintf(&childBuf,
                               "<zpci uid='0x%.4x' fid='0x%.8x'/>\n",
                               info->addr.pci.zpci.uid.value,