Call IDs: Fix appearance of call ID in core show channels when NULL

NULL call IDs were meant to appear as '(none)' but instead were showing
the contents of an uninitialized character buffer.

ASTERISK-24223
Review: https://reviewboard.asterisk.org/r/3979/
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Merged revisions 422664 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 422665 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@422683 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/cli.c b/main/cli.c
index a519cbc49cfbb3b0d8ebdf98030b9560d0afa2c0..f0eb30e33a70c466637bbcc650a38121824aa32c 100644 (file)
--- a/main/cli.c
+++ b/main/cli.c
@@ -1579,6 +1579,7 @@ static char *handle_showchan(struct ast_cli_entry *e, int cmd, struct ast_cli_ar
        ast_translate_path_to_str(ast_channel_readtrans(chan), &read_transpath);
 
        bridge = ast_channel_get_bridge(chan);
+       callid_buf[0] = '\0';
        callid = ast_channel_callid(chan);
        if (callid) {
                ast_callid_strnprint(callid_buf, sizeof(callid_buf), callid);