fix: depth default to zero

[pearmini]

fix: #5610

问题原因：设置 autoFit 时候 depth 为 width 大小，非 0。sliderFilter 设置的 clip path 在 depth 为非 0 的时候有问题。

[coveralls]

Pull Request Test Coverage Report for Build 6493529824

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 88.184%

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Files with Coverage Reduction	New Missed Lines	%
src/runtime/render.ts	2	79.17%

Totals
Change from base Build 6456577491:	-0.03%
Covered Lines:	10035
Relevant Lines:	11019

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💛 - Coveralls