cleanup default value on SIGUSR1

git-svn-id: http://tint2.googlecode.com/svn/trunk@421 121b4492-b84c-0410-8b4c-0d4edfb3f3cc

src/battery/battery.h

@@ -63,6 +63,8 @@ void update_battery();
 
 void init_battery();
 void init_battery_panel(void *panel);
+
+// freed memory and set default values
 void cleanup_battery();
 
 void draw_battery(void *obj, cairo_t *c);