fix: 0 is a validate width

[zombieJ]

fix ant-design/ant-design#26438

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[codecov]

Codecov Report

Merging #522 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #522   +/-   ##
=======================================
  Coverage   99.86%   99.86%           
=======================================
  Files          25       25           
  Lines         762      762           
  Branches      220      220           
=======================================
  Hits          761      761           
  Misses          1        1           

Impacted Files	Coverage Δ
src/Header/FixedHeader.tsx	100.00% <100.00%> (ø)

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