Disabled assert() could use its argument to avoid unused variable warnings

Test this construction for disabling assertions:

```c
#define assert(condition) \
do { \
if (0) { \
(void)(condition); \
} \
} while (0)
```

Additionally, do the same for `RAWLOG()` and `DEBUGLOG()` when `DEBUGLEVEL < 2`.

This would avoid unused variable warnings that show up in production.