demos: add some fflushes for windows
diff --git a/progs/demos/arbfslight.c b/progs/demos/arbfslight.c
index a84491d..275c851 100644
--- a/progs/demos/arbfslight.c
+++ b/progs/demos/arbfslight.c
@@ -105,6 +105,7 @@
 			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;
 		}