xdaliclock: fix $wrksrc usage.

srcpkgs/xdaliclock/template

@@ -1,8 +1,8 @@
 # Template file for 'xdaliclock'
 pkgname=xdaliclock
 version=2.42
-revision=2
-wrksrc=$pkgname-$version/X11
+revision=3
+build_wrksrc=X11
 build_style=gnu-configure
 makedepends="libXext-devel libXt-devel"
 short_desc="Melting digital clock"
@@ -12,7 +12,7 @@ homepage="http://www.jwz.org/xdaliclock/"
 distfiles="http://www.jwz.org/${pkgname}/${pkgname}-${version}.tar.gz"
 checksum=2e2aa266cbc3482e3fcf272c5f38004e583bb6871e717b6e07f2042078e7c9cd
 
-post_extract() {
+pre_configure() {
 	sed -i -e '/a trivial ANSI C/,+10s/ { (exit 1); exit 1; };//' \
 		-e '/INCLUDES=/s/.*/:/' \
 		-e '/LDFLAGS=/s/.*/:/' \