no accumulate..MSVC dwants a header.

src/Magnum/Math/Test/RandomTest.cpp

@@ -23,7 +23,6 @@ struct RandomTest : Corrade::TestSuite::Tester
     void unitVector3();
     void randomRotation();
     void randomDiceChiSquare();
-
 };
 
 typedef Vector<2, Float> Vector2;
@@ -82,14 +81,12 @@ void RandomTest::randomDiceChiSquare()
 
     for (auto i = 0; i < 100; i++)
     {
-
         std::vector<Int> faces(dice_side, 0);
         for (std::size_t i = 0; i < expected * dice_side; i++)
             faces[Math::Random::randomScalar<Int>(g, 0, dice_side - 1)]++;
-        std::vector<Int> residual(dice_side, 0);
+        Float chi_square = 0.0f;
         for (std::size_t i = 0; i < dice_side; i++)
-            residual[i] = Float(pow((faces[i] - expected), 2)) / expected;
+            chi_square += Float(pow((faces[i] - expected), 2)) / expected;
-        Float chi_square = std::accumulate(residual.begin(), residual.end(), 0.0);
         if (chi_square > thresholdfor100)
             error_count++;
     }