re PR c++/40013 (ICE when creating a local array with size from the return value of a member function of an object in a nested class in a template class)

	PR c++/40013
	* pt.c (tsubst): If magic NOP_EXPR with side-effects has no type,
	set it from its operand's type after tsubst_expr.

	* g++.dg/ext/vla7.C: New test.

From-SVN: r147119