Reference-count upb_msgdef and upb_enumdef.

The context owns a reference on each def, defs own references
on defs they reference, and msgs own refs on their def.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/upb_msg.h b/src/upb_msg.h
index 4ca1e2a..42f9bb2 100644
--- a/src/upb_msg.h
+++ b/src/upb_msg.h
@@ -59,6 +59,7 @@ INLINE struct upb_msg *upb_msg_new(struct upb_msgdef *md) {
   memset(msg, 0, size);
   upb_mmhead_init(&msg->mmhead);
   msg->def = md;
+  upb_msgdef_ref(md);
   return msg;
 }