sane: unbreak musl build (take 1, by yours truly).

srcpkgs/sane/patches/musl.patch

@@ -0,0 +1,10 @@
+--- backend/kvs40xx.h.orig	2015-05-08 20:15:52.134639959 +0200
++++ backend/kvs40xx.h	2015-05-08 20:16:00.189632027 +0200
+@@ -1,6 +1,7 @@
+ #ifndef __KVS40XX_H
+ #define __KVS40XX_H
+ 
++#include <pthread.h>
+ /*
+    Copyright (C) 2009, Panasonic Russia Ltd.
+ */

srcpkgs/sane/template

@@ -1,7 +1,7 @@
 # Template build file for 'sane'.
 pkgname=sane
 version=1.0.24
-revision=9
+revision=10
 wrksrc="sane-backends-${version}"
 build_style=gnu-configure
 configure_args="--disable-locking --enable-avahi --disable-latex --enable-ipv6
@@ -100,6 +100,11 @@ if [ "$build_option_systemd" ]; then
 	systemd_services="saned.socket on"
 fi
 
+pre_configure() {
+	for f in $(find $wrksrc -type f -name *.[ch]); do
+		sed -e 's,u_char ,unsigned char ,g' -e 's,u_long,unsigned long ,g' -i $f
+	done
+}
 post_install() {
 	# fix hp officejets
 	echo "#hpaio" >> ${DESTDIR}/etc/sane.d/dll.conf