Re: [PATCH 0/1] MR3089: hhctrl: Simplify allocation size in parse_index_sitemap_object (scan-build).

[Erich Hoover (＠ehoover)]

It doesn't matter what you allocate here, the pointer will be replaced when `item_realloc()` gets called.  This line was originally an allocation of size 0 that got changed in commit 9dba420d0a78:
```
-    item = heap_alloc_zero(sizeof(IndexItem));
+    item = calloc(1, sizeof(IndexItem));
     item->nItems = 0;
-    item->items = heap_alloc_zero(0);
+    item->items = calloc(2, sizeof(void *));
     item->itemFlags = 0x11;
```
So, I would suggest making this a `malloc(0)` instead so that it's clear that we just want the pointer for later use in `realloc`.