Fix incorrect format placeholders

Author: petere

src/backend/executor/execExprInterp.c

@@ -4786,7 +4786,7 @@ ExecPrepareJsonItemCoercion(JsonbValue *item,
 					coercion = &coercions->timestamptz;
 					break;
 				default:
-					elog(ERROR, "unexpected jsonb datetime type oid %d",
+					elog(ERROR, "unexpected jsonb datetime type oid %u",
 						 item->val.datetime.typid);
 					return (Datum) 0;
 			}

src/backend/utils/activity/pgstat_xact.c

@@ -368,7 +368,7 @@ pgstat_create_transactional(PgStat_Kind kind, Oid dboid, Oid objoid)
 	if (pgstat_get_entry_ref(kind, dboid, objoid, false, NULL))
 	{
 		ereport(WARNING,
-				errmsg("resetting existing stats for type %s, db=%d, oid=%d",
+				errmsg("resetting existing stats for type %s, db=%u, oid=%u",
 					   (pgstat_get_kind_info(kind))->name, dboid, objoid));
 
 		pgstat_reset(kind, dboid, objoid);