[c++] fix #error directive in cp-tree.h

[Manuel López-Ibáñez]

In a previous commit I added an #error to handle the case of toplev.h
being added before cp-tree.h.
However, the directive was not syntactically correct. This is a fixed version.

Bootstrapped and regression tested on x86_64-unknown-linux-gnu with
--enable-languages=all,ada

OK for trunk?

2008-08-26  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* cp-tree.h: Fix #error directive.
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: fix-cp-tree.diff
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20080828/8d42bb3c/attachment.ksh>