Do a check to create the default scale if it isn't already

lib/db/postgres7.php

@@ -220,6 +220,10 @@ function main_upgrade($oldversion=0) {
                       )");
     }
 
+    if ($oldversion < 2003081503) {
+        get_scales_menu(0);    // Just to force the default scale to be created
+    }
+
 
     return $result;
 }