fix: 修复element shape进行syncShapeStyle时，可能存在空对象的情况 (#3110)
fix: 修复element shape进行syncShapeStyle时，可能存在空对象的情况 (#3110)

Co-authored-by: xinming <ddbb1563be9e0957f076713c6a60058d36ee5b93@antfin.com>
antvis/g2,antvis/g2,antvis/g2