Tweak previous revision.

sql/database-create.sql

@@ -2608,7 +2608,7 @@ CREATE TABLE `node_idlestats` (
 DROP TABLE IF EXISTS `node_licensekeys`;
 CREATE TABLE `node_licensekeys` (
   `node_id` varchar(32) NOT NULL default '',
-  `keytype` varchar(16) default NULL,
+  `keytype` varchar(16) NOT NULL default '',
   `keydata` mediumtext,
   PRIMARY KEY  (`node_id`,`keytype`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

sql/updates/4/362

@@ -15,7 +15,7 @@ sub DoUpdate($$$)
     if(!DBTableExists("node_licensekeys")) {
 	DBQueryFatal("CREATE TABLE `node_licensekeys` ( ".
 		     " `node_id` varchar(32) NOT NULL default '', ".
-		     " `keytype` varchar(16) default NULL, ".
+		     " `keytype` varchar(16) NOT NULL default '', ".
 		     " `keydata` mediumtext, ".
 		     "  PRIMARY KEY  (`node_id`,`keytype`) ".
 		     ") ENGINE=MyISAM DEFAULT CHARSET=latin1");