Resolve some warnings from MSVC

Author: d-frey

include/tao/json/events/hash.hpp

@@ -86,16 +86,18 @@ namespace tao
             void number( const double v )
             {
                if( v >= 0 ) {
-                  const std::uint64_t u = v;
+                  const std::uint64_t u = static_cast< std::uint64_t >( v );
                   if( u == v ) {
                      number( u );
                      return;
                   }
                }
-               const std::int64_t i = v;
-               if( i == v ) {
-                  number( i );
-                  return;
+               else {
+                  const std::int64_t i = static_cast< std::int64_t >( v );
+                  if( i == v ) {
+                     number( i );
+                     return;
+                  }
                }
                m_digests.back()->feed( 'd' );
                m_digests.back()->feed( &v, sizeof( v ) );

include/tao/json/traits.hpp

@@ -129,17 +129,17 @@ namespace tao
          struct number_trait
          {
             template< template< typename... > class Traits >
-            static void extract( const basic_value< Traits >& v, T& i )
+            static void extract( const basic_value< Traits >& v, T& n )
             {
                switch( v.type() ) {
                   case type::SIGNED:
-                     i = v.unsafe_get_signed();
+                     n = static_cast< T >( v.unsafe_get_signed() );
                      break;
                   case type::UNSIGNED:
-                     i = v.unsafe_get_unsigned();
+                     n = static_cast< T >( v.unsafe_get_unsigned() );
                      break;
                   case type::DOUBLE:
-                     i = v.unsafe_get_double();
+                     n = static_cast< T >( v.unsafe_get_double() );
                      break;
                   default:
                      TAOCPP_JSON_THROW_TYPE_ERROR( v.type() );