libsaria: Report the library size as the play_list size

This is simpler than looping over all library paths and adding up their
individual sizes.

libsaria/library/library.cpp

@@ -70,15 +70,6 @@ namespace libsaria
 		return found;
 	}
 
-	unsigned int library::size()
-	{
-		unsigned int size = 0;
-		list<LibraryPath>::iterator it;
-		for (it = path_list.begin(); it != path_list.end(); it++)
-			size += it->size();
-		return size;
-	}
-
 	void library::refresh()
 	{
 		rebuild_list();

libsaria/library/list.cpp

@@ -15,6 +15,8 @@ namespace libsaria
 		list<LibraryPath>::iterator it;
 		list<TrackTag> *tag_list;
 
+		play_list.clear();
+
 		for (it = path_list->begin(); it != path_list->end(); it++) {
 			tag_list = it->get_list();
 			play_list.insert(play_list.end(), tag_list->begin(), tag_list->end());
@@ -22,4 +24,9 @@ namespace libsaria
 		println("Rebuilding play list");
 	}
 
+	unsigned int library::size()
+	{
+		return play_list.size();
+	}
+
 }; /* Namespace: libsaria */