Add void to openbsd function prototypes

src/core/openbsd/SDL_wscons.h

@@ -19,7 +19,7 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-void SDL_WSCONS_Init();
-void SDL_WSCONS_Quit();
+void SDL_WSCONS_Init(void);
+void SDL_WSCONS_Quit(void);
 
-void SDL_WSCONS_PumpEvents();
+void SDL_WSCONS_PumpEvents(void);

src/core/openbsd/SDL_wscons_kbd.c

@@ -49,7 +49,7 @@
     }
 
 typedef struct SDL_WSCONS_mouse_input_data SDL_WSCONS_mouse_input_data;
-extern SDL_WSCONS_mouse_input_data *SDL_WSCONS_Init_Mouse();
+extern SDL_WSCONS_mouse_input_data *SDL_WSCONS_Init_Mouse(void);
 extern void updateMouse(SDL_WSCONS_mouse_input_data *input);
 extern void SDL_WSCONS_Quit_Mouse(SDL_WSCONS_mouse_input_data *input);