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### Description

I see unexpected return code from route if there is no explicit `return` and switch-case block. <!-- Explain what you did, what you expected to happen, and what actually happened. -->

#### Reproduction

Here is simple configuration part: ``` route(TEST_ROUTE_WITH_SWITCH); xlog("L_WARN", "TEST_ROUTE_WITH_SWITCH result $rc\n"); ... route[TEST_ROUTE_WITH_SWITCH] { $var(a) = "a"; switch ($var(a)) { case "a": case "b": $var(b) = $var(a); break; default: $var(c) = $var(a); }

# must be optional according to documentation: # https://www.kamailio.org/wiki/cookbooks/5.3.x/core#return # > If no value is specified, or a route reaches its end without executing a return statement, it returns 1. # # return 1; } ``` Log: ``` WARNING: <script>: TEST_ROUTE_WITH_SWITCH result 0 ``` At the same time if there is no switch-block, return code is 1 as expected: ``` route[TEST_ROUTE_WITH_SWITCH] { $var(a) = "a"; } ``` Log: ``` WARNING: <script>: TEST_ROUTE_WITH_SWITCH w/o switch-case result 1 ```

### Additional Information

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

``` $ ./build/sbin/kamailio -v version: kamailio 5.7.5 (x86_64/linux) b47500-dirty 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_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: b47500 -dirty compiled on 22:02:13 Nov 9 2024 with /usr/bin/gcc 11.3.1 ```

* **Operating System**:

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``` Oracle Linux 9 ```