num_string.hpp: 引数なしコンストラクタは0初期化としよう

diff --git a/roast/include/roast/lexical/rule/num_string.hpp b/roast/include/roast/lexical/rule/num_string.hpp
index 2452f2d..7abbd63 100644 (file)
--- a/roast/include/roast/lexical/rule/num_string.hpp
+++ b/roast/include/roast/lexical/rule/num_string.hpp
@@ -55,7 +55,7 @@ namespace roast
                                T value;
 
                                //////////////////////////////////////////////////
-                               num_string_(){}
+                               num_string_() : value(0){}
                                num_string_(const T v) : value(v){}
 
                                /*template <typename _It, typename _Param>