Const Correctness for String::Value

include/v8.h

Index: include/v8.h
===================================================================
--- include/v8.h	(Revision 2827)
+++ include/v8.h	(Arbeitskopie)
@@ -979,8 +979,9 @@
    public:
     explicit Utf8Value(Handle<v8::Value> obj);
     ~Utf8Value();
-    char* operator*() const { return str_; }
-    int length() { return length_; }
+    char* operator*() { return str_; }
+    const char* operator*() const { return str_; }
+    int length() const { return length_; }
    private:
     char* str_;
     int length_;
@@ -1001,8 +1002,9 @@
    public:
     explicit AsciiValue(Handle<v8::Value> obj);
     ~AsciiValue();
-    char* operator*() const { return str_; }
-    int length() { return length_; }
+    char* operator*() { return str_; }
+    const char* operator*() const { return str_; }
+    int length() const { return length_; }
    private:
     char* str_;
     int length_;
@@ -1022,8 +1024,9 @@
    public:
     explicit Value(Handle<v8::Value> obj);
     ~Value();
-    uint16_t* operator*() const { return str_; }
-    int length() { return length_; }
+    uint16_t* operator*() { return str_; }
+    const uint16_t* operator*() const { return str_; }
+    int length() const { return length_; }
    private:
     uint16_t* str_;
     int length_;