[ARM] omap: fix lots of 'Using plain integer as NULL pointer'

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/video/omap/omapfb_main.c b/drivers/video/omap/omapfb_main.c
index 51a138b..06a69e0 100644
--- a/drivers/video/omap/omapfb_main.c
+++ b/drivers/video/omap/omapfb_main.c
@@ -740,7 +740,7 @@
 	int ret;
 
 	omapfb_rqueue_lock(plane->fbdev);
-	ret = omapfb_update_window_async(fbi, win, NULL, 0);
+	ret = omapfb_update_window_async(fbi, win, NULL, NULL);
 	omapfb_rqueue_unlock(plane->fbdev);
 
 	return ret;
@@ -768,7 +768,7 @@
 	win.format = 0;
 
 	omapfb_rqueue_lock(fbdev);
-	r = fbdev->ctrl->update_window(fbi, &win, NULL, 0);
+	r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
 	omapfb_rqueue_unlock(fbdev);
 
 	return r;
@@ -1047,7 +1047,7 @@
 		win.height = 2;
 		win.out_width = 2;
 		win.out_height = 2;
-		fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, 0);
+		fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
 	}
 	omapfb_rqueue_unlock(fbdev);
 }