Fix PR c++/47398

gcc/cp/

	PR c++/47398
	* tree.c (cp_tree_equal)<TEMPLATE_PARM_INDEX>: Take the number of
	template parameters in account.

gcc/testsuite/

	PR c++/47398
	* g++.dg/template/typedef37.C: New test.
	* g++.dg/template/param1.C: Adjust expected error message.

From-SVN: r169807