[gupnp/gupnp-1.4] RootDevice: Do not overwrite document with NULL

[Jens Georg <jensgeorg src gnome org>]

commit f7fc650b4ce2fbb3130ea36e19c9d9e76848aee6
Author: Jens Georg <mail jensge org>
Date:   Sun Jan 2 21:21:14 2022 +0100

    RootDevice: Do not overwrite document with NULL

 libgupnp/gupnp-root-device.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/libgupnp/gupnp-root-device.c b/libgupnp/gupnp-root-device.c
index d46aa05..2ebdc6d 100644
--- a/libgupnp/gupnp-root-device.c
+++ b/libgupnp/gupnp-root-device.c
@@ -127,8 +127,10 @@ gupnp_root_device_set_property (GObject      *object,
 
         switch (property_id) {
         case PROP_DESCRIPTION_DOC:
-                _gupnp_device_info_set_document (GUPNP_DEVICE_INFO (device),
-                                                 g_value_get_object (value));
+                if (g_value_get_object (value) != NULL)
+                        _gupnp_device_info_set_document (
+                                GUPNP_DEVICE_INFO (device),
+                                g_value_get_object (value));
                 break;
         case PROP_DESCRIPTION_PATH:
                 priv->description_path = g_value_dup_string (value);