PR preprocessor/28709

	* macro.c (paste_tokens): Do error reporting here, use BUF with the
	spelled LHS token as opposed to spelling it again.
	(paste_all_tokens): Don't report errors here, just break on failure.

	* gcc.dg/cpp/paste14.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@117664 138bc75d-0d04-0410-961f-82ee72b054a4