fix(Area): 修复面积图 x 为空时，图形不绘制 Closed #1867

[zengyue]

Checklist

• npm test passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

Description of change

[github-actions]

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
f2/dist/index.js	+0.02%	1,640.40 kB	1,640.70 kB	+0.01%	309.53 kB	309.56 kB
f2/dist/index.min.js	=	512.86 kB	512.89 kB	=	153.27 kB	153.28 kB

Significant size changes

Includes any change greater than 0.2%:
(No significant changes)

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