remove warnings clang generates

src/menu.h

@@ -39,7 +39,7 @@ template <typename T> struct Menu : public Window
 {
 	struct Item
 	{
-		friend class Menu<T>;
+		friend struct Menu<T>;
 		
 		Item()
 		: m_is_bold(false), m_is_selected(false), m_is_inactive(false), m_is_separator(false) { }
@@ -77,7 +77,7 @@ template <typename T> struct Menu : public Window
 	template <typename ValueT, typename BaseIterator> class ItemIterator
 		: public std::iterator<std::random_access_iterator_tag, ValueT>
 	{
-		friend class Menu<T>;
+		friend struct Menu<T>;
 		
 		BaseIterator m_it;
 		explicit ItemIterator(BaseIterator it) : m_it(it) { }

src/ncmpcpp.cpp

@@ -134,7 +134,7 @@ int main(int argc, char **argv)
 	cerr_buffer = std::cerr.rdbuf();
 	std::cerr.rdbuf(errorlog.rdbuf());
 	
-	NC::InitScreen("ncmpcpp ver. "VERSION, Config.colors_enabled);
+	NC::InitScreen("ncmpcpp ver. " VERSION, Config.colors_enabled);
 	
 	Action::OriginalStatusbarVisibility = Config.statusbar_visibility;
 	

src/song.h

@@ -35,6 +35,8 @@ struct Song
 	typedef std::string (Song::*GetFunction)(unsigned) const;
 	
 	Song() { }
+	virtual ~Song() { }
+	
 	Song(mpd_song *s);
 	
 	virtual std::string getURI(unsigned idx = 0) const;

src/status.cpp

@@ -339,7 +339,7 @@ void NcmpcppStatusChanged(MPD::Connection *, MPD::StatusChanges changed, void *)
 			}
 			case MPD::psStop:
 			{
-				WindowTitle("ncmpcpp ver. "VERSION);
+				WindowTitle("ncmpcpp ver. " VERSION);
 				if (!block_progressbar_update)
 					DrawProgressbar(0, 0);
 				Playlist::ReloadRemaining = true;