Remove the errno check when hashing floating point numbers. It's not really

needed and was causing problems on the Microsoft Windows Smarthone Edition
platform. Fixes #1064.



[SVN r38877]

include/boost/functional/detail/hash_float.hpp

@@ -17,7 +17,6 @@
 #include <boost/functional/detail/float_functions.hpp>
 #include <boost/limits.hpp>
 #include <boost/assert.hpp>
-#include <errno.h>
 
 // Don't use fpclassify or _fpclass for stlport.
 #if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
@@ -48,9 +47,7 @@ namespace boost
         inline std::size_t float_hash_impl(T v)
         {
             int exp = 0;
-            errno = 0;
             v = boost::hash_detail::call_frexp(v, &exp);
-            if(errno) return 0;
 
             std::size_t seed = 0;