Activate asserts also in release mode

example/doc_map.cpp

@@ -15,6 +15,10 @@
 #include <boost/intrusive/set.hpp>
 #include <boost/intrusive/unordered_set.hpp>
 #include <vector>
+
+#ifdef NDEBUG
+#undef NDEBUG
+#endif
 #include <cassert>
 
 using namespace boost::intrusive;