[BUG] xlog creation fails when xlog_level is set to unsupported value

[lardht]

OpenSIPS version you are running

root@vie-ix-voip-sbc:~# opensips -V
version: opensips 3.6.8 (x86_64/linux)
flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, HP_MALLOC, F_PARALLEL_MALLOC, DBG_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535
poll method support: poll, epoll, sigio_rt, select.
git revision: f9f85260e5
main.c compiled on  with gcc 12

Describe the bug

When xlog_level is 10, syslog notifies me about a bug regarding syslog creation

To Reproduce

1. Set xlog_value to 10
2. Start a call
3. Send call to opensips SBC
4. Look at syslog

Expected behavior

Log creation

Relevant System Logs

Sep 02 11:26:57 vie-ix-voip-sbc.innonet.at /usr/sbin/opensips[653113]: CRITICAL:core:add_xlog_data: 
                                                                       >>> Unexpected log level [2]
                                                                       
                                                                       It seems you have hit a programming bug.
                                                                       Please help us make OpenSIPS better by reporting it at https://github.com/OpenSIPS/opensips/issues
Sep 02 11:26:57 vie-ix-voip-sbc.innonet.at /usr/sbin/opensips[653113]: INFO:ci=isbc97C9B3887DA0FC429BC1D32E55B1C4CF ft=9E6607C40EDFA947A8AA215D3D9F1370B3WISVOIP10 tt=36CA0D09-6A97EBDC000D94A1-CDFFB6C0 dlg_status=2
Sep 02 11:26:57 vie-ix-voip-sbc.innonet.at /usr/sbin/opensips[653113]: CRITICAL:core:add_xlog_data: 
                                                                       >>> Unexpected log level [2]
                                                                       
                                                                       It seems you have hit a programming bug.
                                                                       Please help us make OpenSIPS better by reporting it at https://github.com/OpenSIPS/opensips/issues
Sep 02 11:26:57 vie-ix-voip-sbc.innonet.at /usr/sbin/opensips[653113]: NOTICE:DEBUG onreply_route MAIN: dlg_val(profile): sipi

OS/environment information

• deb 12, opensips repo

Additional context
When setting xlog_level to a supported value, the error disappears

[bogdan-iancu]

This seems to be valid only if doing tracing for the xlog's too