iterator_tracker.h (operator++): Fix returning dangling reference.

	* include/profile/iterator_tracker.h (operator++): Fix returning
	dangling reference.
	(operator--): Likewise.

From-SVN: r193323

libstdc++-v3/ChangeLog

+2012-11-08  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
+	* include/profile/iterator_tracker.h (operator++): Fix returning
+	dangling reference.
+	(operator--): Likewise.
+
 2012-11-07  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* include/debug/array (_GLIBCXX_THROW_OR_ABORT): Move...

libstdc++-v3/include/profile/iterator_tracker.h

@@ -93,7 +93,7 @@ namespace __profile
 	return *this;
       }
 
-      __iterator_tracker&
+      __iterator_tracker
       operator++(int)
       {
 	_M_ds->_M_profile_iterate();
@@ -110,7 +110,7 @@ namespace __profile
 	return *this;
       }
 
-      __iterator_tracker&
+      __iterator_tracker
       operator--(int)
       {
 	_M_ds->_M_profile_iterate(1);