app_rpt: "fast hangup" crashing with latest dev.

[mkmer]

There is quite a bit of additional code beyond what I had tested earlier in PR #451

Now when executing the "fast disconnect" test I receive this crash:

[2025-01-19 19:24:50.540] WARNING[420715][C-00000024]: app_rpt/rpt_channel.c:470 send_newkey: Failed to send text !NEWKEY1! on IAX2/149.154.11.243:24357-1639
[2025-01-19 19:24:50.542] WARNING[420715][C-00000024]: app_rpt/rpt_channel.c:470 send_newkey: Failed to send text !NEWKEY1! on IAX2/149.154.11.243:24357-1639
 == Spawn extension (radio-secure, 287893, 1) exited non-zero on 'IAX2/149.154.11.243:24357-1639'
[2025-01-19 19:24:50.542] WARNING[420715][C-00000024]: channel.c:2630 ast_hangup: Hard hangup called by thread LWP 420715 on IAX2/149.154.11.243:24357-1639, while blocked by thread LWP 420617 in procedure ast_waitfor_nandfds!  Expect a failure

core-asterisk-2025-01-20T00-24-50Z-full.txt
core-asterisk-2025-01-20T00-24-50Z-locks.txt
core-asterisk-2025-01-20T00-24-50Z-brief.txt
core-asterisk-2025-01-20T00-24-50Z-info.txt

[mkmer]

This may be a result of me setting up my dev environment wrong too.