Any structures attached to the window_list *must* have a struct nsObject * as their
first entry, and handle events outside of gui.c.
svn path=/trunk/netsurf/; revision=10332
didn't match up, thereby causing a crash. Needs tidying up; the global part of these
window structures should be defined separately, and the events handled in dedicated
routines.
svn path=/trunk/netsurf/; revision=10235
Chris Young