13 lines
350 B
Diff
13 lines
350 B
Diff
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diff --git a/include/ignition/math/Color.hh b/include/ignition/math/Color.hh
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index faf7a08..16758c5 100644
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--- a/include/ignition/math/Color.hh
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+++ b/include/ignition/math/Color.hh
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@@ -18,6 +18,7 @@
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#define IGNITION_MATH_COLOR_HH_
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#include <iostream>
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+#include <cctype>
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#include <ignition/math/Helpers.hh>
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#include <ignition/math/Vector3.hh>
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