Merge fix to suppress a Visual C++ warning. Fixes #1509

[SVN r41920]

include/boost/functional/detail/hash_float.hpp

@@ -14,6 +14,14 @@
 # pragma once
 #endif
 
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#if BOOST_MSVC >= 1400
+#pragma warning(disable:6294) // Ill-defined for-loop: initial condition does
+                              // not satisfy test. Loop body not executed 
+#endif
+#endif
+
 #include <boost/functional/detail/float_functions.hpp>
 #include <boost/integer/static_log2.hpp>
 #include <boost/cstdint.hpp>
@@ -181,4 +189,8 @@ namespace boost
     }
 }
 
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
 #endif