-bool debug_gui_key(int key, bool press, unsigned int modstate);
-bool debug_gui_mbutton(int bn, bool press, int x, int y);
-bool debug_gui_mmotion(int x, int y);
+void debug_gui_key(int key, bool press, unsigned int modstate);
+void debug_gui_mbutton(int bn, bool press, int x, int y);
+void debug_gui_mmotion(int x, int y);
+void debug_gui_wheel(int dir);