extern int filter_vis(t_manager *man);
extern void set_sizes(t_manager *man, real sx, real sy);
-extern gmx_bool toggle_hydrogen(t_x11 *x11, t_molwin *mw);
+extern bool toggle_hydrogen(t_x11 *x11, t_molwin *mw);
/* Toggle the state of the hydrogen drawing,
* return the current state
*/