rsvgdec: Fix uses of librsvg functions deprecated since 2.52
Hi all,
This MR fixes the use of a couple functions (rsvg_handle_get_dimensions
and rsvg_handle_render_cairo
) that are deprecated starting in librsvg 2.52.
I have not paired this with the corresponding upgrade MR (cerbero!1444 (merged)) as upstream needs a little more work to fix packaging.
Let me know what you think.