This issue was found by Cppcheck (static C/C++ code analysis tool).
extern struct GfxInfo gfx;
extern struct TileCursorInfo tile_cursor;
extern struct OverlayInfo overlay;
extern struct GfxInfo gfx;
extern struct TileCursorInfo tile_cursor;
extern struct OverlayInfo overlay;
-extern struct AnimInfo anim;
extern struct ArtworkInfo artwork;
extern struct JoystickInfo joystick;
extern struct SetupInfo setup;
extern struct ArtworkInfo artwork;
extern struct JoystickInfo joystick;
extern struct SetupInfo setup;