win64: stack-trace repair: add cached tail to trace

src/racket/src/jitstack.c

@@ -291,6 +291,14 @@ Scheme_Object *scheme_native_stack_trace(void)
       }
     }
 
+    if (last)
+      SCHEME_CDR(last) = tail;
+    else
+      first = tail;
+    
+    if (SCHEME_NULLP(first))
+      return NULL;
+    else
       return first;
   }
 #endif