libprelude: fixed to not build the easy bindings if swig is not installed

Note:

We need swig to regenerate the binding sources and without it building the
"easy bindings" (high level API) will fail!

security/libprelude/libprelude.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../libprelude/libprelude.conf
-# Copyright (C) 2011 The OpenSDE Project
+# Copyright (C) 2011 - 2012 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -17,3 +17,13 @@ if pkginstalled perl; then
 	# install perl modules into vendor
 	var_append extraconfopt ' ' "--with-perl-installdirs=vendor"
 fi
+
+# we need swig to regenerate the binding sources and without it
+# building the "easy bindings" (high level API) will fail
+if pkginstalled -f swig; then
+	var_append extraconfopt ' ' "--with-swig"
+	var_append extraconfopt ' ' "--enable-easy-bindings"
+else
+	var_append extraconfopt ' ' "--without-swig"
+	var_append extraconfopt ' ' "--disable-easy-bindings"
+fi