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	an error_mark_node from lookup_template_function, return the same.
	(determine_specialization): Also make sure TEMPLATE_ID isn't an
	error_mark_node, before we try to read its operands.
	* decl.c (grokdeclarator): If we got an error_mark_node from
	check_explicit_specialization, just return it right back.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@20444 138bc75d-0d04-0410-961f-82ee72b054a4