John Mark Bell 947ab0dcd2 Ensure content structures are zero initialised.
Make css_destroy check that the stylesheet pointer exists (content 
destructors may be called whilst the content is still loading - e.g. if 
the content type isn't permissable in the context it was loaded from).
Fixes 1627413, 1580980.

svn path=/trunk/netsurf/; revision=3212
2007-03-18 20:19:13 +00:00
..
2007-03-18 13:02:07 +00:00
2007-01-29 22:27:15 +00:00