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	* tree.c (mapcar): When dealing with a DECL, use it's constant
	value, if any.
	* pt.c (lookup_template_class): Don't mangle the names of template
	classes whose arguments are unknown.
	* pt.c (tsubst_expr): Handle GOTO_STMT correctly.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@18802 138bc75d-0d04-0410-961f-82ee72b054a4