PR64903 simplify last fix to std::is_partitioned

	PR libstdc++/64903
	* include/bits/stl_algo.h (is_partitioned): Use increment instead of
	std::advance.

From-SVN: r244675

libstdc++-v3/ChangeLog

+2017-01-20  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/64903
+	* include/bits/stl_algo.h (is_partitioned): Use increment instead of
+	std::advance.
+
 2017-01-19  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/79156
@@ -7,7 +13,7 @@
 	* testsuite/ext/shared_ptr/1.cc: New test.
 
 	PR libstdc++/64903
-	* include/bits/stl_algo.h (is_partioned): Don't retest the partition
+	* include/bits/stl_algo.h (is_partitioned): Don't retest the partition
 	point.
 	* testsuite/25_algorithms/is_partitioned/2.cc: New test.
 

libstdc++-v3/include/bits/stl_algo.h

@@ -585,7 +585,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __first = std::find_if_not(__first, __last, __pred);
       if (__first == __last)
 	return true;
-      std::advance(__first, 1);
+      ++__first;
       return std::none_of(__first, __last, __pred);
     }