ColorScheme: fix stack-use-after-scope detected by ASAN

src/ColorScheme.cpp

@@ -310,12 +310,13 @@ ColorEntry ColorScheme::colorEntry(int index, uint randomSeed) const
     const double maxLightness = qMin(baseLightness + range.lightness / 2.0, MaxLightness);
     // Use triangular distribution with peak at L=50.0.
     // Dark and very light colors are less distinguishable.
-    const auto lightnessIntervals = (minLightness < 50.0 && 50.0 < maxLightness)
-        ? std::initializer_list<double>{minLightness, 50.0, maxLightness}
-        : std::initializer_list<double>{minLightness, maxLightness};
     static const auto lightnessWeightsFunc = [](double v) { return 50.0 - qAbs(v - 50.0); };
-    std::piecewise_linear_distribution<> lightnessDistribution(lightnessIntervals,
-                                                               lightnessWeightsFunc);
+    std::piecewise_linear_distribution<> lightnessDistribution;
+    if (minLightness < 50.0 && 50.0 < maxLightness) {
+        lightnessDistribution = std::piecewise_linear_distribution<>({minLightness, 50.0, maxLightness}, lightnessWeightsFunc);
+    } else {
+        lightnessDistribution = std::piecewise_linear_distribution<>({minLightness, maxLightness}, lightnessWeightsFunc);
+    }
     const double lightness = qFuzzyCompare(minLightness, maxLightness)
                              ? baseLightness
                              : lightnessDistribution(randomEngine);