fix compilation with gcc 4.8

Author: pcarruscag

Common/include/linear_algebra/CSysVector.hpp

@@ -101,7 +101,7 @@ class CSysVector : public VecExpr::CVecExpr<CSysVector<ScalarType>, ScalarType>
   /*!
    * \brief Default constructor of the class.
    */
-  CSysVector() = default;
+  CSysVector() {}
 
   /*!
    * \brief Destructor

Common/include/parallelization/vectorization.hpp

@@ -78,7 +78,7 @@ class Array : public CVecExpr<Array<Scalar_t,N>, Scalar_t> {
   static constexpr bool StoreAsRef = true;
 
 private:
-  alignas(Align) Scalar x_[N];
+  alignas(Size*sizeof(Scalar)) Scalar x_[N];
 
 public:
 #define ARRAY_BOILERPLATE                                                     \