Issue #15144: Fix possible integer overflow when handling pointers as integer values, by using Py_uintptr_t instead of size_t.
Patch by Serhiy Storchaka.
diff --git a/Parser/node.c b/Parser/node.c
index 0dea30f..1e4f0da 100644
--- a/Parser/node.c
+++ b/Parser/node.c
@@ -71,7 +71,7 @@
  * capacity.  The code is tricky to avoid that.
  */
 #define XXXROUNDUP(n) ((n) <= 1 ? (n) :                 \
-               (n) <= 128 ? (((n) + 3) & ~3) :          \
+               (n) <= 128 ? _Py_SIZE_ROUND_UP((n), 4) : \
                fancy_roundup(n))