libsaria: Give playlists an apparent_size() function

This will return the number of visible songs, instead of the number of
songs in the playlist.

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

include/libsaria/playlist.h

@@ -49,6 +49,7 @@ namespace libsaria
 
 			void sort();
 			unsigned int size();
+			unsigned int apparent_size();
 			Track *next();
 
 			/* Iterator functions */

libsaria/library/list/list.cpp

@@ -42,9 +42,7 @@ namespace libsaria
 
 	unsigned int library::size()
 	{
-		if (index::is_filtered() == true)
-			return index::size();
-		return lib_playlist.size();
+		return lib_playlist.apparent_size();
 	}
 
 }

libsaria/playlist/playlist.cpp

@@ -1,5 +1,6 @@
 // Copyright (c) 2012 Bryan Schumaker.
 #include <libsaria/files.h>
+#include <libsaria/index.h>
 #include <libsaria/library.h>
 #include <libsaria/playlist.h>
 
@@ -71,4 +72,10 @@ namespace libsaria
 		return plist.size();
 	}
 
+	unsigned int Playlist::apparent_size()
+	{
+		if ( (flags & PL_FILTER) && (index::is_filtered()) )
+			return index::size();
+		return plist.size();
+	}
 }