--- a/agent.pl	Mon Dec 01 20:54:23 2008 +0800
+++ b/agent.pl	Tue Dec 02 02:08:50 2008 +0800
@@ -70,7 +70,7 @@
 sub is_safehouse_enough {
     my ($self, $city) = @_;
     return 0 if(!defined($city->{buildings}->{safehouse}));
-    return 1 if($$city->{buildings}->{townHall} >= 20);
+    return 1 if($city->{buildings}->{townHall} >= 20);
 
     # build the higgest safehouse.
     # maybe we should have more then 4 towns, then we consider that we should upgrade safehouse at level 20.