I take this as well.

Created attachment 171751 [details] [review]
gtkhtml patch

for gtkhtml;

It produces a compiler warning when compiling against gtk2, but I do not care of this, as it'll be gone with gtk3.

The warnings are with:
 gtk_binding_set_activate
 gtk_bindings_activate_event

telling:
 passing argument x of ‘y’ from incompatible pointer type
 note: expected ‘struct GtkObject *’ but argument is of type ‘struct GObject *’

Created commit 63cb71f in gtkhtml master (2.91.1+)

err, 3.91.1+ for gtkhtml