Re: [1/4] msxml3: libxml2 error/warning callback functions (try 2)

[Alexandre Julliard]

Adam Martinson  writes:
> -
>    len = vsnprintf(NULL, 0, msg, ap);
> -
>    buf = heap_alloc(len+1);
> -
>    vsnprintf(buf, len+1, msg, ap);

vsnprintf can also return -1, check how this is done in other places.