Address feedback

Author: atcuno

volatility3/framework/plugins/windows/handles.py

@@ -341,7 +341,7 @@ def _generator(self, procs):
                         try:
                             obj_name = entry.NameInfo.Name.String
                         except (ValueError, exceptions.InvalidAddressException):
-                            obj_name = ""
+                            obj_name = None
 
                 except exceptions.InvalidAddressException:
                     vollog.log(
@@ -359,7 +359,7 @@ def _generator(self, procs):
                         format_hints.Hex(entry.HandleValue),
                         obj_type,
                         format_hints.Hex(entry.GrantedAccess),
-                        obj_name,
+                        obj_name or renderers.NotAvailableValue(),
                     ),
                 )
 

volatility3/framework/symbols/windows/extensions/registry.py

@@ -138,11 +138,11 @@ def get_full_key_name(self) -> str:
         kcb = self.KeyControlBlock
         while kcb.ParentKcb:
             if kcb.ParentKcb.vol.offset in seen:
-                return ""
+                return None
             seen.add(kcb.ParentKcb.vol.offset)
 
             if len(output) > 128:
-                return ""
+                return None
 
             if kcb.NameBlock.Name is None:
                 break