qemu: cold-unplug of watchdog

https://bugzilla.redhat.com/show_bug.cgi?id=1447169

Again, no special here.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/libvirt_private.syms

@@ -539,6 +539,7 @@ virDomainVirtTypeFromString;
 virDomainVirtTypeToString;
 virDomainWatchdogActionTypeFromString;
 virDomainWatchdogActionTypeToString;
+virDomainWatchdogDefFree;
 virDomainWatchdogModelTypeFromString;
 virDomainWatchdogModelTypeToString;
 virDomainXMLOptionGetNamespace;

src/qemu/qemu_driver.c

@@ -8169,10 +8169,19 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
         break;
 
 
+    case VIR_DOMAIN_DEVICE_WATCHDOG:
+        if (!vmdef->watchdog) {
+            virReportError(VIR_ERR_OPERATION_FAILED, "%s",
+                           _("domain has no watchdog"));
+            return -1;
+        }
+        virDomainWatchdogDefFree(vmdef->watchdog);
+        vmdef->watchdog = NULL;
+        break;
+
     case VIR_DOMAIN_DEVICE_INPUT:
     case VIR_DOMAIN_DEVICE_SOUND:
     case VIR_DOMAIN_DEVICE_VIDEO:
-    case VIR_DOMAIN_DEVICE_WATCHDOG:
     case VIR_DOMAIN_DEVICE_GRAPHICS:
     case VIR_DOMAIN_DEVICE_HUB:
     case VIR_DOMAIN_DEVICE_SMARTCARD: