colorchart: fix a bug in dead code to please Sonar Cloud static analy… #434

Job	Run time
Win64.UCRT64.skiptest.Debug.Ninja	26m 59s
Linux.jammy.GNU13.skiptest.Debug.Ninja	6m 3s
Win64.UCRT64.nofeatures.Debug.Ninja	24m 45s
Linux.jammy.GNU13.nofeatures.Debug.Ninja	3m 42s
macOS.${{ matrix.compiler.compiler }}.${{ matrix.build.xcode }}.${{ matrix.target }}.${{ matrix.btype }}.${{ matrix.generator }}	0s
Win64.UCRT64.skiptest.Release.Ninja	25m 57s
Linux.jammy.GNU13.skiptest.Release.Ninja	5m 17s
Win64.UCRT64.nofeatures.Release.Ninja	25m 44s
Linux.jammy.GNU13.nofeatures.Release.Ninja	4m 24s
Linux.jammy.LLVM15.skiptest.Debug.Ninja	4m 33s
Linux.jammy.LLVM15.nofeatures.Debug.Ninja	3m 54s
Linux.jammy.LLVM15.skiptest.Release.Ninja	5m 26s
Linux.jammy.LLVM15.nofeatures.Release.Ninja	4m 34s
	2h 21m 18s

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