Use barfitty.barf.barf() instead of new Error() so the pathName is

included in the error object for JS 1.5 (used in Win32 builds)

xtrn/dgnlance/dgnlance.js

 var startup_path='.';
-try { throw new Error() } catch(e) { startup_path=e.fileName }
+try { throw barfitty.bar.barf() } catch(e) { startup_path=e.fileName }
 startup_path=startup_path.replace(/\/[^\/]*$/,'');
 startup_path=backslash(startup_path);