Fix copy&paste error in __gnu_debug::vector

	* include/debug/vector (__gnu_debug::vector::emplace_back): Fix return
	type.

From-SVN: r241350

libstdc++-v3/ChangeLog

 2016-10-19  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/debug/vector (__gnu_debug::vector::emplace_back): Fix return
+	type.
+
 	* include/backward/auto_ptr.h (dauto_ptr): Correct comment about
 	conversions from auto_ptr<Derived> rvalues to auto_ptr<Base>.
 	* testsuite/20_util/auto_ptr/assign_neg.cc: Remove redundant dg-error

libstdc++-v3/include/debug/vector

@@ -479,7 +479,7 @@ namespace __debug
 
       template<typename... _Args>
 #if __cplusplus > 201402L
-	deque<_Tp, _Alloc>::reference
+	reference
 #else
 	void
 #endif