url: make Curl_close() NULLify the pointer too

This is the common pattern used in the code and by a unified approach we
avoid mistakes.

Closes #4534

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/url.h b/lib/url.h
index f4d611add..053fbdffc 100644
--- a/lib/url.h
+++ b/lib/url.h
@@ -49,7 +49,7 @@ CURLcode Curl_init_userdefined(struct Curl_easy *data);
 
 void Curl_freeset(struct Curl_easy * data);
 CURLcode Curl_uc_to_curlcode(CURLUcode uc);
-CURLcode Curl_close(struct Curl_easy *data); /* opposite of curl_open() */
+CURLcode Curl_close(struct Curl_easy **datap); /* opposite of curl_open() */
 CURLcode Curl_connect(struct Curl_easy *, bool *async, bool *protocol_connect);
 CURLcode Curl_disconnect(struct Curl_easy *data,
                          struct connectdata *, bool dead_connection);