Re: [PATCH v2 09/14] bisect.c: use commit-slab for commit weight instead of commit->util

Nguyễn Thái Ngọc Duy  [off-list ref] writes:

-		p->item->util = &weights[n++];
+		*commit_weight_at(&commit_weight, p->item) = &weights[n++];

Interesting to see that this cleverness was inherited from the
original code that used the util field :-).  I was wondering why
the code was using "int*" without on-demand allocation.