fix matrix product with EIGEN_DEFAULT_TO_ROW_MAJOR

test/product.h

@@ -77,6 +77,7 @@ template<typename MatrixType> void product(const MatrixType& m)
 
   // begin testing Product.h: only associativity for now
   // (we use Transpose.h but this doesn't count as a test for it)
+
   VERIFY_IS_APPROX((m1*m1.transpose())*m2,  m1*(m1.transpose()*m2));
   m3 = m1;
   m3 *= m1.transpose() * m2;