libstdc++: Add missing std:: qualification of a forward call

	* include/bits/hashtable.h
	(_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
	missing std namespace qualification to forward call.

libstdc++-v3/ChangeLog

+2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/bits/hashtable.h
+	(_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
+	missing std namespace qualification to forward call.
+
 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
 
 	* testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix

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

@@ -1371,7 +1371,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  using _Fwd_Ht = typename
 	    conditional<__move_if_noexcept_cond<value_type>::value,
 			const _Hashtable&, _Hashtable&&>::type;
-	  _M_assign(forward<_Fwd_Ht>(__ht), __alloc_gen);
+	  _M_assign(std::forward<_Fwd_Ht>(__ht), __alloc_gen);
 	  __ht.clear();
 	}
     }