evenly_sized_tracks - fix simple compile error #2126

Job	Run time
Documentation	13s
Clippy	29s
Build Benchmarks (w/ yoga)	1m 3s
Build Benchmarks	36s
Test Fixture Formatting	18s
Rustfmt	12s
Markdown Lint	4s
Test Suite [alloc + all algorithms]	1m 9s
Test Suite [std + block)]	1m 6s
Build [debug feature]	14s
Test Suite [default except content_size]	1m 13s
Test Suite [default features]	1m 4s
Test Suite [default + serde]	1m 11s
Test Suite [std + flexbox]	1m 10s
Test Suite [std + grid]	1m 6s
MSRV Build [Rust 1.65]	1m 14s
Test Suite [alloc + no algorithms]	1m 12s
Test Suite [std (no algorithms)]	1m 11s
Test Suite [no features]	1m 13s
	15m 58s

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