Cleanup : rename Set_mode_SDL() to GFX2_Set_mode()

src/sdlscreen.h

@@ -33,8 +33,6 @@
 #include "struct.h"
 #include "global.h"
 
-void Set_mode_SDL(int *,int *,int);
-
 GFX2_GLOBAL SDL_Rect ** List_SDL_video_modes;
 
 ///
@@ -54,4 +52,4 @@ void Set_SDL_pixel_8(SDL_Surface *bmp, int x, int y, byte color);
 /// Convert a SDL Palette to a grafx2 palette
 void Get_SDL_Palette(const SDL_Palette * sdl_palette, T_Palette palette);
 
-#endif // SDLSCREEN_H_INCLUDED
+#endif // SDLSCREEN_H_INCLUDED