bpo-34493: Objects/genobject.c: Add missing NULL check to compute_cr_origin()

Author: Alexey Izbyshev

Objects/genobject.c

@@ -1128,6 +1128,9 @@ compute_cr_origin(int origin_depth)
 
     /* Now collect them */
     PyObject *cr_origin = PyTuple_New(frame_count);
+    if (cr_origin == NULL) {
+        return NULL;
+    }
     frame = PyEval_GetFrame();
     for (int i = 0; i < frame_count; ++i) {
         PyObject *frameinfo = Py_BuildValue(