2013-02-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/56282
	Revert:
	2013-02-06  Edward Smith-Rowland  <3dw4rd@verizon.net>

	PR libstdc++/56193
	* include/bits/basic_ios.h: Replace operator void*() const
	with explicit operator bool() const in C++11 and greater.
	* testsuite/27_io/basic_ios/pr56193.cc: New file.

From-SVN: r195939