Fixed claws-mail to correctly enable libSM support for session management

We have to export LDFLAGS including the libdir of libsm to succesfully
complete a test configure runs for detecting libsm support.

mail/claws-mail/claws-mail.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 # 
 # Filename: package/.../claws-mail/claws-mail.conf
-# Copyright (C) 2006 The OpenSDE Project
+# Copyright (C) 2006 - 2007 The OpenSDE Project
 # Copyright (C) 2006 The T2 SDE Project
 # 
 # More information can be found in the files COPYING and README.
@@ -13,6 +13,15 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
+# workaround to correctly enable libSM support for session management
+if pkginstalled libsm ; then
+	pkgprefix -t libsm
+	var_append LDFLAGS ' ' "-L$root$( pkgprefix libdir libsm )"
+	export LDFLAGS
+else
+	var_append confopt ' ' "--disable-libsm"
+fi
+
 if pkginstalled openldap ; then
 	pkgprefix -t openldap
 	LDAPLIBS="$root/$( pkgprefix libdir openldap )"