sane-backends: fix libv4l dependency

Patch from Fedora.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/sane-backends/sane-backends-1.0.22-v4l.patch

@@ -0,0 +1,66 @@
+From Fedora git: http://pkgs.fedoraproject.org/gitweb/?p=sane-backends.git;a=blob;f=sane-backends-1.0.22-v4l.patch;hb=4c4b8135b896ef9f00b926ce5f435ae5c9b156d5
+
+From 26c69b228b29f612faf4b0cc85db969ee7cc4ea6 Mon Sep 17 00:00:00 2001
+From: Nils Philippsen <nils@redhat.com>
+Date: Mon, 14 Mar 2011 13:35:05 +0100
+Subject: [PATCH] patch: v4l
+
+Squashed commit of the following:
+
+commit 23381932c76846191b42a48e505b37cd74711265
+Author: Julien BLACHE <jb@jblache.org>
+Date:   Wed Feb 16 19:37:43 2011 +0100
+
+    Fix v4l build with libv4l 0.8.3+
+
+    (cherry picked from commit c5ca46c2d1be78c651afb843cc834cf2b5b24953)
+
+    Conflicts:
+
+    	ChangeLog
+
+    Signed-off-by: Nils Philippsen <nils@redhat.com>
+---
+ backend/v4l.c |    3 +--
+ backend/v4l.h |    3 ++-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/backend/v4l.c b/backend/v4l.c
+index 6510ef0..38595ed 100644
+--- a/backend/v4l.c
++++ b/backend/v4l.c
+@@ -84,9 +84,8 @@
+ #include "../include/sane/sanei_config.h"
+ #define V4L_CONFIG_FILE "v4l.conf"
+ 
+-#include "v4l.h"
+-
+ #include <libv4l1.h>
++#include "v4l.h"
+ 
+ static const SANE_Device **devlist = NULL;
+ static int num_devices;
+diff --git a/backend/v4l.h b/backend/v4l.h
+index 588b96e..6aee586 100644
+--- a/backend/v4l.h
++++ b/backend/v4l.h
+@@ -29,6 +29,7 @@
+ #ifndef v4l_h
+ #define v4l_h
+ 
++#ifndef __LINUX_VIDEODEV_H
+ /* Kernel interface */
+ /* Only the stuff we need. For more features, more defines are needed */
+ 
+@@ -165,7 +166,7 @@ struct video_channel
+ 
+ 
+ /* end of kernel interface */
+-
++#endif /* !__LINUX_VIDEODEV_H */
+ 
+ #include <../include/sane/sane.h>
+ 
+-- 
+1.7.4
+

package/sane-backends/sane-backends.mk

@@ -22,6 +22,10 @@ ifeq ($(BR2_PACKAGE_TIFF),y)
 SANE_BACKENDS_DEPENDENCIES += tiff
 endif
 
+ifeq ($(BR2_PACKAGE_LIBV4L),y)
+SANE_BACKENDS_DEPENDENCIES += libv4l
+endif
+
 ifeq ($(BR2_PACKAGE_AVAHI)$(BR2_PACKAGE_DBUS)$(BR2_PACKAGE_LIBGLIB2),yyy)
 SANE_BACKENDS_DEPENDENCIES += avahi
 SANE_BACKENDS_CONF_OPT += --enable-avahi