fix Menu copy constructor

it has to make deep copy of itsOptions.

src/menu.h

@@ -232,15 +232,22 @@ template <typename T> NCurses::Menu<T>::Menu(size_t startx,
 {
 }
 
-template <typename T> NCurses::Menu<T>::Menu(const Menu &m) : Window(m)
-{
-	itsOptions = m.itsOptions;
-	itsItemDisplayer = m.itsItemDisplayer;
-	itsItemDisplayerUserdata = m.itsItemDisplayerUserdata;
-	itsBeginning = m.itsBeginning;
-	itsHighlight = m.itsHighlight;
-	itsHighlightColor = m.itsHighlightColor;
-	highlightEnabled = m.highlightEnabled;
+template <typename T> NCurses::Menu<T>::Menu(const Menu &m) : Window(m),
+					itsItemDisplayer(m.itsItemDisplayer),
+					itsItemDisplayerUserdata(m.itsItemDisplayerUserdata),
+					itsGetStringFunction(m.itsGetStringFunction),
+					itsGetStringFunctionUserData(m.itsGetStringFunctionUserData),
+					itsOptionsPtr(m.itsOptionsPtr),
+					itsBeginning(m.itsBeginning),
+					itsHighlight(m.itsHighlight),
+					itsHighlightColor(m.itsHighlightColor),
+					highlightEnabled(m.highlightEnabled),
+					itsSelectedPrefix(m.itsSelectedPrefix),
+					itsSelectedSuffix(m.itsSelectedSuffix)
+{
+	itsOptions.reserve(m.itsOptions.size());
+	for (option_const_iterator it = m.itsOptions.begin(); it != m.itsOptions.end(); it++)
+		itsOptions.push_back(new Option(**it));
 }
 
 template <typename T> NCurses::Menu<T>::~Menu()

src/strbuffer.h

@@ -47,6 +47,7 @@ namespace NCurses
 		
 		public:
 			basic_buffer() : itsTempString(0) { }
+			basic_buffer(const basic_buffer &b);
 			
 			std::basic_string<C> Str() const;
 			void SetFormatting(short vb, const std::basic_string<C> &s, short ve, bool for_each = 1);
@@ -71,6 +72,12 @@ namespace NCurses
 	typedef basic_buffer<wchar_t> WBuffer;
 }
 
+template <typename C> NCurses::basic_buffer<C>::basic_buffer(const basic_buffer &b) : itsFormat(b.itsFormat),
+										itsTempString(b.itsTempString)
+{
+	itsString << b.itsString.str();
+}
+
 template <typename C> std::basic_string<C> NCurses::basic_buffer<C>::Str() const
 {
 	return itsString.str();