libsaria: Change library size when filtered

I return the number of visible songs, so if the user has entered a
filter string then I return the size of the results set.  If we're not
filtered then I return the size of the playlist.

libsaria/library/index.cpp

@@ -167,6 +167,11 @@ namespace libsaria
 		trigger_callback(REFILTER);
 	}
 
+	bool library::is_filtered()
+	{
+		return filtered;
+	}
+
 	bool library::is_visible(ino_t &inode)
 	{
 		set<ino_t>::iterator it;
@@ -177,4 +182,9 @@ namespace libsaria
 		return it != results.end();
 	}
 
+	unsigned int library::filter_size()
+	{
+		return results.size();
+	}
+
 }; /* Namespace: libsaria */

libsaria/library/library.h

@@ -65,6 +65,8 @@ namespace libsaria
 		LibraryPath *get_path(string);
 		void rebuild_list();
 		void reindex();
+		bool is_filtered();
+		unsigned int filter_size();
 	}
 }
 

libsaria/library/list.cpp

@@ -148,6 +148,8 @@ namespace libsaria
 
 	unsigned int library::size()
 	{
+		if (is_filtered() == true)
+			return filter_size();
 		return play_list.size();
 	}