Fix VS warnings

cdunn2001 · cdunn2001 · commit dc5aa4ad7f7d · 2015-09-28T17:05:57.000-05:00
These don't really need to be const. resolves open-source-parsers#369
diff --git a/include/json/value.h b/include/json/value.h
@@ -43,7 +43,7 @@ class JSON_API Exception : public std::exception {
   ~Exception() throw() override;
   char const* what() const throw() override;
 protected:
-  std::string const msg_;
+  std::string msg_;
 };
 
 /** Exceptions which the user cannot easily avoid.
