udevRemoveOneDevice: Unlock node device obj upon return

When removing a node device object from the internal list the
udevRemoveOneDevice() function does plain unref over the object.
This is not sufficient. If there is another thread that's waiting
for the object lock it will wait forever.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/node_device/node_device_udev.c

@@ -1244,7 +1244,7 @@ udevRemoveOneDevice(struct udev_device *device)
     VIR_DEBUG("Removing device '%s' with sysfs path '%s'",
               def->name, name);
     virNodeDeviceObjListRemove(driver->devs, obj);
-    virObjectUnref(obj);
+    virNodeDeviceObjEndAPI(&obj);
 
     virObjectEventStateQueue(driver->nodeDeviceEventState, event);
     return 0;