Return a correct user agent if NPN_UserAgent is called with a null NPP from NPP_New.
Created attachment 75294 [details] Patch
Attachment 75294 [details] did not build on qt: Build output: http://queues.webkit.org/results/6638011
Committed r73057: <http://trac.webkit.org/changeset/73057>
http://trac.webkit.org/changeset/73057 might have broken GTK Linux 32-bit Release