Updated todo.txt

todo.txt

@@ -7,6 +7,9 @@ Section content is listed in order of importance. Some of these can be ideas too
 
 * Fix ambience not always playing: separate timers for each player.
 
+* Fix zvision not disabled if the class value is blank. Improve ZVision function,
+  use strlen instead of checking the first character. Also check the main CVAR.
+
 * Make admin commands to get or set classes:
   zr_classes_set <classname> <target>
   zr_classes_get <#userid|name>