better err checks in resizetuple
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 7fae264..2218e50 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -408,13 +408,13 @@
int sizediff;
v = (tupleobject *) *pv;
- sizediff = newsize - v->ob_size;
- if (!is_tupleobject(v) || v->ob_refcnt != 1) {
+ if (v == NULL || !is_tupleobject(v) || v->ob_refcnt != 1) {
*pv = 0;
DECREF(v);
err_badcall();
return -1;
}
+ sizediff = newsize - v->ob_size;
if (sizediff == 0)
return 0;
/* XXX UNREF/NEWREF interface should be more symmetrical */