rsvg_handle_new_from_data calls rsvg_handle_fill_with_data which itself calls
rsvg_handle_close on success, so we don't have to.

And older versions of librsvg (e.g. 2.16.1) don't protect against
rsvg_handle_close getting called twice, although new versions do,
so we crash on e.g. RHEL-5

Change-Id: I451075e50c9c2c7b07289356d7a92eb55db82f9f