add a cast to https-client.c

diff --git a/sample/https-client.c b/sample/https-client.c
index e13ac4bd342f51cfc2369f2437cdade828a8933d..b5f0b1ae57c05e9a528889427864a46b67b80791 100644 (file)
--- a/sample/https-client.c
+++ b/sample/https-client.c
@@ -402,7 +402,7 @@ main(int argc, char **argv)
                        evbuffer_add(output_buffer, buf, s);
                        bytes += s;
                }
-               evutil_snprintf(buf, sizeof(buf)-1, "%lu", bytes);
+               evutil_snprintf(buf, sizeof(buf)-1, "%lu", (unsigned long)bytes);
                evhttp_add_header(output_headers, "Content-Length", buf);
                fclose(f);
        }