httpapi/tests: Cancel a pending receive request (Valgrind).

Signed-off-by: Sven Baars <sven.wine@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/httpapi/tests/httpapi.c

@@ -534,6 +534,8 @@ static void test_v1_short_buffer(void)
     ok(!ret, "Got error %u.\n", ret);
     ok(req->RequestId == req_id, "Got request ID %s.\n", wine_dbgstr_longlong(req->RequestId));
 
+    CancelIoEx(queue, &ovl);
+
     ret = HttpRemoveUrl(queue, localhost_urlW);
     ok(!ret, "Got error %u.\n", ret);
     closesocket(s);