Another build fix...
diff --git a/Magick++/demo/demo.cpp b/Magick++/demo/demo.cpp
index 8a127f8..15c91e9 100644
--- a/Magick++/demo/demo.cpp
+++ b/Magick++/demo/demo.cpp
@@ -442,8 +442,8 @@
       cout << "  threshold random ..." << endl;
       example = model;
       example.label( "Random\nThreshold" );
-      example.randomThreshold( Geometry((size_t) (0.3*QuantumRange),
-        (size_t) (0.85*QuantumRange)) );
+      example.randomThreshold( (0.3*QuantumRange),
+        (0.85*QuantumRange) );
       images.push_back( example );
     
       cout << "  unsharp mask ..." << endl;