Improve input validation in command_worldactive().

diff --git a/roguelike-server b/roguelike-server
index 10fbd3680dc4f6930df561f4b0bd103514428e60..d68b4ff204ee6abf6a76032f49e7981d5c860a3e 100755 (executable)
--- a/roguelike-server
+++ b/roguelike-server
@@ -1370,7 +1370,7 @@ def command_worldactive(worldactive_string):
     map. On activation, rebuild all Things' FOVs, and the player's map memory.
     """
     val = integer_test(worldactive_string, 0, 1)
-    if val:
+    if None != val:
         if 0 != world_db["WORLD_ACTIVE"]:
             if 0 == val:
                 set_world_inactive()