Added dlib:: in front of the set.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402544

examples/bayes_net_gui_ex.cpp

@@ -40,7 +40,7 @@ using namespace dlib::bayes_node_utils;
 
 typedef directed_graph<bayes_node>::kernel_1a_c directed_graph_type;
 typedef directed_graph<bayes_node>::kernel_1a_c::node_type node_type;
-typedef graph<set<unsigned long>::compare_1b_c, set<unsigned long>::compare_1b_c>::kernel_1a_c join_tree_type;
+typedef graph<dlib::set<unsigned long>::compare_1b_c, dlib::set<unsigned long>::compare_1b_c>::kernel_1a_c join_tree_type;
 
 //  ----------------------------------------------------------------------------