Set sip_request ast_str data to NULL so ast_str_copy allocates space properly

in copy_request

(issue #14478)
Reported by: erik_dedecker

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@177624 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 9864ea2fbb879bec0771f3f88c095e9e69dcac44..1cf7eb871377414b86d171c70720d747ede30b63 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -19497,6 +19497,7 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
                                        /* Chan2: Call between asterisk and transferee */
 
        int res = 0;
+       current.req.data = NULL;
 
        if (req->debug)
                ast_verbose("Call %s got a SIP call transfer from %s: (REFER)!\n", p->callid, ast_test_flag(&p->flags[0], SIP_OUTGOING) ? "callee" : "caller");