Combine WinHTTP API calls

src/transports/winhttp.c

@@ -266,24 +266,18 @@ static int winhttp_stream_connect(winhttp_stream *s)
 	}
 
 	if (post_verb == s->verb) {
-		/* Send Content-Type header -- only necessary on a POST */
+		/* Send Content-Type and Accept headers -- only necessary on a POST */
 		git_buf_clear(&buf);
-		if (git_buf_printf(&buf, "Content-Type: application/x-git-%s-request", s->service) < 0)
+		if (git_buf_printf(&buf,
+			"Content-Type: application/x-git-%s-request\r\n"
+			"Accept: application/x-git-%s-result\r\n",
+			s->service, s->service) < 0)
 			goto on_error;
 
 		git__utf8_to_16(ct, MAX_CONTENT_TYPE_LEN, git_buf_cstr(&buf));
 
-		if (!WinHttpAddRequestHeaders(s->request, ct, (ULONG) -1L, WINHTTP_ADDREQ_FLAG_ADD)) {
-			giterr_set(GITERR_OS, "Failed to add a header to the request");
-			goto on_error;
-		}
-
-		/* Set the Accept header */
-		git_buf_clear(&buf);
-		if (git_buf_printf(&buf, "Accept: application/x-git-%s-result\r\n", s->service) < 0)
-			goto on_error;
-		git__utf8_to_16(ct, MAX_CONTENT_TYPE_LEN, git_buf_cstr(&buf));
-		if (!WinHttpAddRequestHeaders(s->request, ct, (ULONG) -1L, WINHTTP_ADDREQ_FLAG_REPLACE)) {
+		if (!WinHttpAddRequestHeaders(s->request, ct, (ULONG) -1L,
+			WINHTTP_ADDREQ_FLAG_ADD | WINHTTP_ADDREQ_FLAG_REPLACE)) {
 			giterr_set(GITERR_OS, "Failed to add a header to the request");
 			goto on_error;
 		}