[ljcom] r9764: do not issue an SQL query with an empty ...

U   trunk/cgi-bin/LJ/PromoText.pm

Modified: trunk/cgi-bin/LJ/PromoText.pm
===================================================================
--- trunk/cgi-bin/LJ/PromoText.pm	2010-11-29 04:05:00 UTC (rev 9763)
+++ trunk/cgi-bin/LJ/PromoText.pm	2010-11-30 03:52:51 UTC (rev 9764)
@@ -155,6 +155,8 @@
         $sets{$row->{setid}} = $row;
     }
 
+    return unless %sets;
+
     # get the items of each set that the given effective class can see
     my $need_bind = join(",", map { "?" } keys %sets);
     $sth = $dbh->prepare("SELECT * FROM promo_item WHERE setid IN ($need_bind)");