fix SDL on Windows compile

src/osd/modules/render/draw13.cpp

@@ -174,11 +174,11 @@ public:
 		}
 	}
 
-	/* virtual */ int create();
-	/* virtual */ int draw(const int update);
-	/* virtual */ int xy_to_render_target(const int x, const int y, int *xt, int *yt);
-	/* virtual */ void destroy();
-	/* virtual */ render_primitive_list *get_primitives()
+	/* virtual */ int create() override;
+	/* virtual */ int draw(const int update) override;
+	/* virtual */ int xy_to_render_target(const int x, const int y, int *xt, int *yt) override;
+	/* virtual */ void destroy() override;
+	/* virtual */ render_primitive_list *get_primitives() override
 	{
 		osd_dim nd = window().blit_surface_size();
 		if (nd != m_blit_dim)

src/osd/modules/render/drawogl.cpp

@@ -362,29 +362,29 @@ public:
 	{
 		SDL_GL_DeleteContext(m_context);
 	}
-	virtual void MakeCurrent()
+	virtual void MakeCurrent() override
 	{
 		SDL_GL_MakeCurrent(m_window, m_context);
 	}
 
-	virtual int SetSwapInterval(const int swap)
+	virtual int SetSwapInterval(const int swap) override
 	{
 		return SDL_GL_SetSwapInterval(swap);
 	}
 
-	virtual const char *LastErrorMsg()
+	virtual const char *LastErrorMsg() override
 	{
 		if (m_error[0] == 0)
 			return NULL;
 		else
 			return m_error;
 	}
-	virtual void *getProcAddress(const char *proc)
+	virtual void *getProcAddress(const char *proc) override
 	{
 		return SDL_GL_GetProcAddress(proc);
 	}
 
-	virtual void SwapBuffer()
+	virtual void SwapBuffer() override
 	{
 		SDL_GL_SwapWindow(m_window);
 	}

src/osd/modules/sound/sdl_sound.cpp

@@ -57,13 +57,13 @@ public:
 	}
 	virtual ~sound_sdl() { }
 
-	virtual int init(const osd_options &options);
-	virtual void exit();
+	virtual int init(const osd_options &options) override;
+	virtual void exit() override;
 
 	// sound_module
 
-	virtual void update_audio_stream(bool is_throttled, const INT16 *buffer, int samples_this_frame);
-	virtual void set_mastervolume(int attenuation);
+	virtual void update_audio_stream(bool is_throttled, const INT16 *buffer, int samples_this_frame) override;
+	virtual void set_mastervolume(int attenuation) override;
 
 private:
 	int lock_buffer(bool is_throttled, long offset, long size, void **buffer1, long *length1, void **buffer2, long *length2);

src/osd/sdl/osdsdl.h

@@ -147,32 +147,32 @@ public:
 	virtual ~sdl_osd_interface();
 
 	// general overridables
-	virtual void init(running_machine &machine);
-	virtual void update(bool skip_redraw);
+	virtual void init(running_machine &machine) override;
+	virtual void update(bool skip_redraw) override;
 
 	// input overridables
-	virtual void customize_input_type_list(simple_list<input_type_entry> &typelist);
+	virtual void customize_input_type_list(simple_list<input_type_entry> &typelist) override;
 
-	virtual void video_register();
+	virtual void video_register() override;
 
-	virtual bool video_init();
-	virtual bool window_init();
-	virtual bool input_init();
-	virtual void input_pause();
-	virtual void input_resume();
-	virtual bool output_init();
+	virtual bool video_init() override;
+	virtual bool window_init() override;
+	virtual bool input_init() override;
+	virtual void input_pause() override;
+	virtual void input_resume() override;
+	virtual bool output_init() override;
 	//virtual bool midi_init();
 
-	virtual void video_exit();
-	virtual void window_exit();
-	virtual void input_exit();
-	virtual void output_exit();
+	virtual void video_exit() override;
+	virtual void window_exit() override;
+	virtual void input_exit() override;
+	virtual void output_exit() override;
 	//virtual void midi_exit();
 
 	sdl_options &options() { return m_options; }
 
 private:
-	virtual void osd_exit();
+	virtual void osd_exit() override;
 
 	void extract_video_config();
 

src/osd/sdl/video.h

@@ -171,7 +171,7 @@ public:
 	static BOOL CALLBACK monitor_enum_callback(HMONITOR handle, HDC dc, LPRECT rect, LPARAM data);
 #endif
 private:
-	void virtual refresh();
+	void virtual refresh() override;
 
 	UINT64              m_handle;                 // handle to the monitor
 };

src/osd/sdl/window.h

@@ -79,7 +79,7 @@ public:
 
 	void notify_changed();
 
-	osd_dim get_size()
+	osd_dim get_size() override
 	{
 #if (SDLMAME_SDL2)
 		int w=0; int h=0;
@@ -92,18 +92,18 @@ public:
 
 	int xy_to_render_target(int x, int y, int *xt, int *yt);
 
-	running_machine &machine() const { return m_machine; }
-	osd_monitor_info *monitor() const { return m_monitor; }
-	int fullscreen() const { return m_fullscreen; }
+	running_machine &machine() const override { return m_machine; }
+	osd_monitor_info *monitor() const override { return m_monitor; }
+	int fullscreen() const override { return m_fullscreen; }
 
-	render_target *target() { return m_target; }
+	render_target *target() override { return m_target; }
 #if (SDLMAME_SDL2)
-	SDL_Window *sdl_window() { return m_sdl_window; }
+	SDL_Window *sdl_window() override { return m_sdl_window; }
 #else
 	SDL_Surface *sdl_surface() { return m_sdlsurf; }
 #endif
 
-	osd_dim blit_surface_size();
+	osd_dim blit_surface_size() override;
 	int prescale() const { return m_prescale; }
 
 	// Pointer to next window