V4L/DVB (4953): Usbvision minor fixes

- fix debug outputs
- fix returned parameters on VIDIOC_G_FMT, VIDIOC_S_FMT and 
  VIDIOC_TRY_FMT and mmap size setting

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/usbvision/usbvision.h b/drivers/media/video/usbvision/usbvision.h
index f2eeda8..0e7e3d6 100644
--- a/drivers/media/video/usbvision/usbvision.h
+++ b/drivers/media/video/usbvision/usbvision.h
@@ -3,9 +3,14 @@
  *  usbvision header file
  *
  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
+ *                         Dwaine Garden <dwainegarden@rogers.com>
+ *
+ *
+ * Report problems to v4l MailingList : http://www.redhat.com/mailman/listinfo/video4linux-list
  *
  * This module is part of usbvision driver project.
  * Updates to driver completed by Dwaine P. Garden
+ * v4l2 conversion by Thierry Merle <thierry.merle@free.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,6 +37,8 @@
 #include <media/tuner.h>
 #include <linux/videodev2.h>
 
+#define USBVISION_DEBUG		/* Turn on debug messages */
+
 #ifndef VID_HARDWARE_USBVISION
 	#define VID_HARDWARE_USBVISION 34   /* USBVision Video Grabber */
 #endif