### Description

Calling functions from the `dialplan` module in 5.8 (`dp_translate()`, `dp_match()`) results in the following line being logged:

``` WARNING: <core> [core/mem/q_malloc.c:520]: qm_free(): WARNING: free(0) called from dialplan: dp_db.c: pcre2_free(206) ```

Is this a functional problem, or just a case of overly aggressive logging?

### Troubleshooting

#### Reproduction Reproducible with the following kamailio config:

``` #!KAMAILIO

loadmodule "pv" loadmodule "db_sqlite" loadmodule "xlog" loadmodule "dialplan"

disable_tcp = true force_rport = true

!!define DBFILE /etc/kamailio/kamailio.sqlite

modparamx("db_sqlite","db_set_readonly", "$def(DBFILE)")

modparamx("dialplan","db_url", "sqlite:///$def(DBFILE)") modparam("dialplan", "attrs_pvar", "$avp(dp_attrs)")

request_route { if ( $rm == "ACK" ) { exit; }

xinfo("$ci New request\n");

dp_match("1", "$rU"); exit; } ```

The warning log is issued in 5.8 but not 5.7. Reproduced by sending a request with SIPp:

``` sipp -sn uac -m 1 -s 15554445555 localhost ```

### Possible Solutions

Not sure if this is just a case of logging being overly aggressive, or an issue with the module's memory management.

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.8.1 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_SEND_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 12.2.0 ```

Tested using docker `debian:12-slim` using the official packages from `http://deb.kamailio.org/kamailio58%60

* **Operating System**:

Docker debian:12-slim, but also observed in Alpine Linux/