fixes crash in "scheduled_destroy" in chan_iax

A signed short was used to represent a callnumber.  This is makes
it possible to attempt to access the iaxs array with a negative
index.

(closes issue #16565)
Reported by: jensvb

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@238411 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 7d321f45db034a6e349b48842c9146de136cea90..ac58c7703dc9281f6a596d9336c48dad33306b60 100644 (file)
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -1507,7 +1507,7 @@ retry:
 
 static int scheduled_destroy(const void *vid)
 {
-       short callno = PTR_TO_CALLNO(vid);
+       unsigned short callno = PTR_TO_CALLNO(vid);
        ast_mutex_lock(&iaxsl[callno]);
        if (iaxs[callno]) {
                if (option_debug) {