Merge hash from trunk.

- Avoid `-Wconversion` warnings.


[SVN r67664]

include/boost/functional/hash/detail/hash_float_generic.hpp

@@ -53,7 +53,7 @@ namespace boost
 
             v = ldexp(v, limits<std::size_t>::digits);
             std::size_t seed = static_cast<std::size_t>(v);
-            v -= seed;
+            v -= static_cast<T>(seed);
 
             // ceiling(digits(T) * log2(radix(T))/ digits(size_t)) - 1;
             std::size_t const length
@@ -66,7 +66,7 @@ namespace boost
             {
                 v = ldexp(v, limits<std::size_t>::digits);
                 std::size_t part = static_cast<std::size_t>(v);
-                v -= part;
+                v -= static_cast<T>(part);
                 hash_float_combine(seed, part);
             }
 

include/boost/functional/hash/hash.hpp

@@ -210,8 +210,8 @@ namespace boost
 #endif
     {
 #if defined(__VMS) && __INITIAL_POINTER_SIZE == 64
-	// for some reason ptrdiff_t on OpenVMS compiler with
-	// 64 bit is not 64 bit !!!
+    // for some reason ptrdiff_t on OpenVMS compiler with
+    // 64 bit is not 64 bit !!!
         std::size_t x = static_cast<std::size_t>(
            reinterpret_cast<long long int>(v));
 #else