[sr-dev] [kamailio/kamailio] asan: load of misaligned address (Issue #2914)

### Description I fave compiled Kamailio with ASAN and enabled alignment checks (`-fno-sanitize=alignment` do not used). And get error ``` core/cfg/cfg_script.c:120:10: runtime error: load of misaligned address 0xffff96900cdc for type 'struct cfg_script_var_t *', which requires 8 byte alignment 0xffff96900cdc: note: pointer points here 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 ```

I do not aware this is important or not. Leave it for your review.

### Additional Information

Compiled 375f86b69e11cf835ae919873d3cd56f32d589c8 Arch aarch64