add missin break that was causing the yres to leak into the overlay option

options.h

@@ -49,6 +49,7 @@ static error_t parse_opt (int key, char *arg, struct argp_state *state)
 			break;
 		case 'y':
 			config->Yres = std::stoi(arg);
+			break;
 		case 'o':
 			config->overlay = arg;
 			break;