[PATCH] http: clear POSTFIELDS when initializing a slot

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After posting a short request using CURLOPT_POSTFIELDS, if the slot
is reused for posting a large payload, the slot ends up having both
POSTFIELDS (which now points at a random garbage) and READFUNCTION,
in which case the curl library tries to use the stale POSTFIELDS.

Clear it as part of the general slot initialization in get_active_slot().

Heavylifting-by: Shawn Pearce <spearce@xxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---

 * This came up while Shawn was looking at the smart HTTP code again.  It
   makes me wonder why we do not use curl_easy_reset() in this function,
   though...

 http.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/http.c b/http.c
index ed6414a..b642eac 100644
--- a/http.c
+++ b/http.c
@@ -494,6 +494,7 @@ struct active_request_slot *get_active_slot(void)
 	curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, NULL);
+	curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
 	curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
 
-- 
1.7.5

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