demos: add some fflushes for windows
diff --git a/progs/demos/glslnoise.c b/progs/demos/glslnoise.c
index 4ee1292..e972b62 100644
--- a/progs/demos/glslnoise.c
+++ b/progs/demos/glslnoise.c
@@ -65,6 +65,7 @@
       GLfloat seconds = (GLfloat) (t - t0) / 1000.0f;
       GLfloat fps = frames / seconds;
       printf ("%d frames in %6.3f seconds = %6.3f FPS\n", frames, seconds, fps);
+      fflush(stdout);
       t0 = t;
       frames = 0;
    }