[librest] oauth: Don't leak RestProxyCall::token{_secret}

[Christophe Fergeau <teuf src gnome org>]

commit f8d82acaa268d45c5a071216524ba0b9a5da479f
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Tue Sep 2 18:42:45 2014 +0200

    oauth: Don't leak RestProxyCall::token{_secret}
    
    https://bugzilla.gnome.org/show_bug.cgi?id=735922

 rest/oauth-proxy-call.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/rest/oauth-proxy-call.c b/rest/oauth-proxy-call.c
index ac94492..dce2c66 100644
--- a/rest/oauth-proxy-call.c
+++ b/rest/oauth-proxy-call.c
@@ -340,6 +340,8 @@ oauth_proxy_call_parse_token_response (OAuthProxyCall *call)
 
   form = soup_form_decode (rest_proxy_call_get_payload (REST_PROXY_CALL (call)));
 
+  g_free (priv->token);
+  g_free (priv->token_secret);
   priv->token = g_strdup (g_hash_table_lookup (form, "oauth_token"));
   priv->token_secret = g_strdup (g_hash_table_lookup (form, "oauth_token_secret"));
   /* This header should only exist for request_token replies, but its easier just to always check it */