http: correct curl version check for CURLOPT_PINNEDPUBLICKEY

In aeff8a6121 (http: implement public key pinning, 2016-02-15) a
dependency and warning() was added if curl older than 7.44.0 was used,
but the relevant code depended on CURLOPT_PINNEDPUBLICKEY, introduced
in 7.39.0.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http.c

@@ -59,7 +59,7 @@ static struct {
 static const char *ssl_key;
 static const char *ssl_capath;
 static const char *curl_no_proxy;
-#if LIBCURL_VERSION_NUM >= 0x072c00
+#if LIBCURL_VERSION_NUM >= 0x072700
 static const char *ssl_pinnedkey;
 #endif
 static const char *ssl_cainfo;
@@ -373,10 +373,10 @@ static int http_options(const char *var, const char *value, void *cb)
 	}
 
 	if (!strcmp("http.pinnedpubkey", var)) {
-#if LIBCURL_VERSION_NUM >= 0x072c00
+#if LIBCURL_VERSION_NUM >= 0x072700
 		return git_config_pathname(&ssl_pinnedkey, var, value);
 #else
-		warning(_("Public key pinning not supported with cURL < 7.44.0"));
+		warning(_("Public key pinning not supported with cURL < 7.39.0"));
 		return 0;
 #endif
 	}
@@ -845,7 +845,7 @@ static CURL *get_curl_handle(void)
 		curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
 	if (ssl_capath != NULL)
 		curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
-#if LIBCURL_VERSION_NUM >= 0x072c00
+#if LIBCURL_VERSION_NUM >= 0x072700
 	if (ssl_pinnedkey != NULL)
 		curl_easy_setopt(result, CURLOPT_PINNEDPUBLICKEY, ssl_pinnedkey);
 #endif