coding style: #ifdef blocks and real C blocks

Hi,

I couldn't find any mention of #ifdef usage nor any example of how I'm
thinking of using #ifdef, so I'm posing this here.

Right now here's what I have on my local branch:

---
#ifdef USE_CURL_MULTI
	slot = get_active_multi_slot();
#else
	slot = get_active_slot();
#endif
	slot->callback_func = process_response;
	slot->callback_data = request;
	request->slot = slot;
---

I want to implement an option that's stored in the variable
"persistent_connection", which basically makes the code behave as if
USE_CURL_MULTI isn't defined. (This would make git open/close less
connections throughout the lifespan of its execution, which would
remove/minimize the number of credential prompting if authentication
is required, among other advantages.)

Here's what I thought of:

---
#ifdef USE_CURL_MULTI
	if (!persistent_connection)
		slot = get_active_multi_slot();
	else
		slot = get_active_slot();
#else
	slot = get_active_slot();
#endif
---

I thought of shortening this further to

---
#ifdef USE_CURL_MULTI
if (!persistent_connection)
	slot = get_active_multi_slot();
else
#else
	slot = get_active_slot();
#endif
	slot->callback_func = process_response;
	slot->callback_data = request;
	request->slot = slot;
---

What would you suggest?

-- 
Cheers,
Ray Chuan