fix error handling mistake in patch for Bug 13028
Visual Studio compiler discovered a problem in patch for Bug 13028 (https://gitweb.torproject.org/tor-browser.git/blobdiff/777695d09e3cff4c79c48839e1c9d5102b772d6f..04c046e11f6622f44ca010bcb8ecf68cf470a4c0:/security/nss/lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c)
In both cases, return PR_FAILURE;
should be PKIX_ERROR(PKIX_PRNEWTCPSOCKETFAILED);
Fixup attached.