re PR c++/11347 (Error on valid expression in default value for int argument to inner...

re PR c++/11347 (Error on valid expression in default value for int argument to inner template.)

cp:
	PR c++/11347
	* pt.c (instantiate_class_template): Increment
	processing_template_decl around the tsubst of a template member
	class.
	(tsubst_qualified_id): Assert we do not have a dependent scope.
testsuite:
	PR c++/11347
	* g++.dg/template/memtmpl1.C: New.

From-SVN: r69994