progs/fp: Redraw upon keypress.
diff --git a/progs/fp/tri-depthwrite2.c b/progs/fp/tri-depthwrite2.c
index 3c0b4d3..5999495 100644
--- a/progs/fp/tri-depthwrite2.c
+++ b/progs/fp/tri-depthwrite2.c
@@ -55,7 +55,7 @@
       case 27:
 	exit(1);
       default:
-	return;
+	break;
     }
 
     glutPostRedisplay();