progs/fp: Redraw upon keypress.
diff --git a/progs/fp/tri-param.c b/progs/fp/tri-param.c
index 57443d7..26a804d 100644
--- a/progs/fp/tri-param.c
+++ b/progs/fp/tri-param.c
@@ -54,7 +54,7 @@
       case 27:
 	exit(1);
       default:
-	return;
+	break;
     }
 
     glutPostRedisplay();