Backport css: Avoid a crash while parsing radial gradients
has_size does not imply that sizes[0] is != NULL.
(cherry picked from commit aceba748)
Fixes downstream issue https://gitlab.com/inkscape/inkscape/-/issues/2932
has_size does not imply that sizes[0] is != NULL.
(cherry picked from commit aceba748)
Fixes downstream issue https://gitlab.com/inkscape/inkscape/-/issues/2932