The string size is always less or equal to the size of the token (len),
so by allocating len+1 bytes we have enough space to write the whole
token and the null byte, if needed.
- pipewire supports parsing unquoted strings and they are used
extensively in JSON .conf files.
- Extend this support into wireplumber, as it wants to use the pipewire
like syntax in its JSON .conf files.
The va_list type might not always be a pointer in some architectures, so we
cannot guarantee it will be modified after using it for a second time in another
function. This fixes the issue by using macros so args does not get copied, and
always gets modified when using it more than once.
