Use "final" and "override" where appropriate (#117)

stratosphere/pm/source/pm_info.hpp

@@ -6,12 +6,12 @@ enum InformationCmd {
     Information_Cmd_GetTitleId = 0,
 };
 
-class InformationService : IServiceObject {
+class InformationService final : IServiceObject {
     public:
-        virtual Result dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size);
-        virtual Result handle_deferred();
+        Result dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size) override;
+        Result handle_deferred() override;
         
     private:
         /* Actual commands. */
         std::tuple<Result, u64> get_title_id(u64 pid);
-};
+};