Fixed operator>>(object const& o, various types& v) return type and value problem.

https://github.com/msgpack/msgpack-c/issues/105

erb/cpp03_define.hpp.erb

@@ -38,12 +38,12 @@
 #define MSGPACK_ADD_ENUM(enum) \
   namespace msgpack { \
     template <> \
-    inline enum& operator>> (object const& o, enum& v) \
+    inline object const& operator>> (object const& o, enum& v) \
     { \
       int tmp; \
       o >> tmp; \
       v = static_cast<enum>(tmp); \
-      return v; \
+      return o; \
     } \
     template <> \
     inline void operator<< (object::with_zone& o, const enum& v) \
@@ -145,4 +145,3 @@ define<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> make_define(A0& a0<%1.upto(i) {|j|%>,
 
 
 #endif // MSGPACK_CPP03_DEFINE_HPP
-