Fix most annoying SVG bug, SVG path data number parsing issue

Hopefully we will get this from upstream on next dist upgrade however
this is most annoying issue of Wikimedia SVG parser, so lets fix it

Cherrypicked from https://git.gnome.org/browse/librsvg/commit/?id=5ba4343bccc7e1765f38f87490b3d6a3a500fde1

Change-Id: I5f7cfec14ed4cb3d22197f377d9e26a0c0101c9b