Fix a regression bug inside windows network_manager

dissect/target/plugins/os/windows/network.py

@@ -257,7 +257,8 @@
                     continue
 
                 # Extract the network device configuration for given interface id
-                config = self._extract_network_device_config(net_cfg_instance_id)
+                if not (config := self._extract_network_device_config(net_cfg_instance_id)):
+                    continue
 
                 # Extract a network device name for given interface id
                 try:
@@ -313,9 +314,7 @@
                         _target=self.target,
                     )
 
-    def _extract_network_device_config(
-        self, interface_id: str
-    ) -> list[dict[str, str | list], dict[str, str | list]] | None:
+    def _extract_network_device_config(self, interface_id: str) -> list[dict[str, set | bool | None]]:
         """Extract network device configuration from the given interface_id for all ControlSets on the system."""
 
         dhcp_config = {
@@ -344,10 +343,10 @@
                 )
             )
         except RegistryKeyNotFoundError:
-            return None
+            return []
 
         if not len(keys):
-            return None
+            return []
 
         for key in keys:
             # Extract DHCP configuration from the registry