serialize: Deprecate `begin_ptr` / `end_ptr`

Implement `begin_ptr` and `end_ptr` in terms of C++11 code,
and add a comment that they are deprecated.

Follow-up to developer notes update in 654a21162252294b7dbd6c982fec88008af7335e.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/prevector.h b/src/prevector.h
index d840dfcd08..25bce522dc 100644
--- a/src/prevector.h
+++ b/src/prevector.h
@@ -476,7 +476,7 @@ public:
         }
     }
 
-    value_type* data() noexcept {
+    value_type* data() {
         return item_ptr(0);
     }