bpo-35814: Allow unpacking in r.h.s of annotated assignment expressions (GH-13760)

diff --git a/Python/ast.c b/Python/ast.c
index b775522..df92429 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -3398,7 +3398,7 @@
         }
         else {
             ch = CHILD(ann, 3);
-            if (TYPE(ch) == testlist) {
+            if (TYPE(ch) == testlist_star_expr) {
                 expr3 = ast_for_testlist(c, ch);
             }
             else {