xbps: add a temp patch to fix incorrect assertion; enough until 0.19 is out.

srcpkgs/xbps/patches/remove_obsoletes_incorrect_assertion.patch

@@ -0,0 +1,17 @@
+Remove incorrect assertion that may be hit in packages that
+set conf_files with files not installed.
+
+Temporary fix until xbps-0.19 is released.
+
+--- lib/package_remove_obsoletes.c.orig	2012-12-03 17:27:30.354154688 +0100
++++ lib/package_remove_obsoletes.c	2012-12-03 17:27:49.560683084 +0100
+@@ -67,7 +67,8 @@ again:
+ 		found = false;
+ 		obj = prop_array_get(array, i);
+ 		oldstr = prop_dictionary_get(obj, "file");
+-		assert(oldstr);
++		if (oldstr == NULL)
++			continue;
+ 
+ 		file = xbps_xasprintf(".%s",
+ 		    prop_string_cstring_nocopy(oldstr));

srcpkgs/xbps/template

@@ -1,7 +1,7 @@
 # Template file for 'xbps'
 pkgname=xbps
 version=0.18.1
-revision=2
+revision=3
 build_style=configure
 configure_args="--prefix=/ --exec-prefix=/usr --sbindir=/usr/sbin
  --with-tests --with-static"