Fix potential usage of deallocated objects

sources/CoreRealm/Features/Commands/BuiltInCommands/ACommandHelp.uc

@@ -178,6 +178,8 @@ private final function FillCommandToAliasesMap(Feature enabledFeature)
         InsertIntoAliasesMap(commandName, subcommandName, availableAliases[i]);
         commandName.FreeSelf();
         subcommandName.FreeSelf();
+        commandName = none;
+        subcommandName = none;
     }
     //  Clean up
     _.memory.FreeMany(availableAliases);