[redland] Redland giving seg fault in a loop.

[Art Barstow]

On Mon, Oct 29, 2001 at 10:22:04AM +0000, Dave Beckett wrote:
>  18	    librdf_free_world(rlworld);
>  19	    if (rlworld != NULL) {

I haven't done much C hacking recently but my recollection
is that one should be very careful about dereferencing a pointer 
after it is freed.  In this case, the documentation for librdf_free_world:

 http://www.redland.opensource.ac.uk/docs/api/r85.html

doesn't explicitly say that it sets its pointer to NULL so it
seem like a bad idea to do the above.