re PR libstdc++/57666 (valarray<T>::operator= in c++11 mode does not adapt to size)

2013-06-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/57666
	* include/std/valarray (valarray<>::operator=(const _Expr<>&)):
	Implement correctly C++11 26.6.2.3/1.
	* testsuite/26_numerics/valarray/dr630-3.C: New.

From-SVN: r200305