re PR c++/23841 (Floating-point literals cast to integral types should be accepted in integer constant expressions)

	PR c++/23841
	* parser.c (cp_parser_primary_expression): Recognize the closing
	">" of a template-argument-list after a floating-point literal as
	the end of a cast expression.

	PR c++/23841
	* g++.dg/parse/template17.C: New test.

From-SVN: r104208