libsigc++: update to 2.4.0.

srcpkgs/libsigc++/template

@@ -1,7 +1,7 @@
 # Template file for 'libsigc++'
 pkgname=libsigc++
-version=2.3.1
-revision=2
+version=2.4.0
+revision=1
 build_style=gnu-configure
 configure_args="--enable-static --disable-documentation"
 short_desc="Type-safe callback system for C++ programs"
@@ -9,7 +9,7 @@ maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://libsigc.sourceforge.net/"
 license="LGPL-2.1"
 distfiles="${GNOME_SITE}/${pkgname}/${version%.*}/${pkgname}-${version}.tar.xz"
-checksum=67d05852b31fdb267c9fdcecd40b046a11aa54d884435e99e3c60dd20cd60393
+checksum=7593d5fa9187bbad7c6868dce375ce3079a805f3f1e74236143bceb15a37cd30
 
 libsigc++-devel_package() {
 	depends="${sourcepkg}>=${version}_${revision}"