Fix use of __libcpp_deallocate in dynarray

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@345234 91177308-0d34-0410-b5e6-96231b3b80d8

include/experimental/dynarray

@@ -146,7 +146,7 @@ private:
 
     static inline _LIBCPP_INLINE_VISIBILITY
     void __deallocate_value(value_type* __ptr ) noexcept {
-        _VSTD::__libcpp_deallocate(static_cast<void *>(__ptr), __alignof(value_type));
+        _VSTD::__libcpp_deallocate_unsized(static_cast<void *>(__ptr), __alignof(value_type));
     }
 
 public: