Index: boost/lexical_cast.hpp
===================================================================
--- boost/lexical_cast.hpp	(revision 85618)
+++ boost/lexical_cast.hpp	(working copy)
@@ -1446,7 +1446,7 @@
             }
 
             template <class T, class SomeCharT>
-            bool shl_real_type(const T& val, SomeCharT* begin, SomeCharT*& end) {
+            bool shl_real_type(const T& val, SomeCharT*, SomeCharT*&) {
                 lcast_set_precision(out_stream, &val);
                 return shl_input_streamable(val);
             }