Missed a reference to prebuilt in last commit

lib/publish.js

@@ -77,10 +77,10 @@ function publish_ (arg, data, isRetry, cachedir, cb) {
     ("This package has been marked as private\n"
     +"Remove the 'private' field from the package.json to publish it."))
 
-  regPublish(data, tb, isRetry, arg, cachedir, cb)
+  regPublish(data, isRetry, arg, cachedir, cb)
 }
 
-function regPublish (data, prebuilt, isRetry, arg, cachedir, cb) {
+function regPublish (data, isRetry, arg, cachedir, cb) {
   // check to see if there's a README.md in there.
   var readme = path.resolve(cachedir, "README.md")
     , tarball = cachedir + ".tgz"