fix MapBase's ForceAligned concept which was not working at all....

Eigen/src/Core/Map.h

@@ -39,7 +39,7 @@
   * This class represents a matrix or vector expression mapping an existing array of data.
   * It can be used to let Eigen interface without any overhead with non-Eigen data structures,
   * such as plain C arrays or structures from other libraries.
-  * 
+  *
   * \b Tips: to change the array of data mapped by a Map object, you can use the C++
   * placement new syntax:
   *
@@ -72,12 +72,9 @@ template<typename MatrixType, int PacketAccess> class Map
 
     inline int stride() const { return this->innerSize(); }
 
-    AlignedDerivedType forceAligned()
+    AlignedDerivedType _convertToForceAligned()
     {
-      if (PacketAccess==ForceAligned)
-        return *this;
-      else
-        return Map<MatrixType,ForceAligned>(Base::m_data, Base::m_rows.value(), Base::m_cols.value());
+      return Map<MatrixType,ForceAligned>(Base::m_data, Base::m_rows.value(), Base::m_cols.value());
     }
 
     inline Map(const Scalar* data) : Base(data) {}
@@ -85,7 +82,7 @@ template<typename MatrixType, int PacketAccess> class Map
     inline Map(const Scalar* data, int size) : Base(data, size) {}
 
     inline Map(const Scalar* data, int rows, int cols) : Base(data, rows, cols) {}
-    
+
     inline void resize(int rows, int cols)
     {
       EIGEN_ONLY_USED_FOR_DEBUG(rows);