Adding code x2

include/J3ML/LinearAlgebra/Vector2.h

@@ -1,7 +1,9 @@
-#include <cstddef>
 
 #pragma once
 
+#include <J3ML/LinearAlgebra.h>
+#include <cstddef>
+
 
 namespace LinearAlgebra {
 
@@ -25,6 +27,7 @@ namespace LinearAlgebra {
         static const Vector2 Left;
         static const Vector2 Down;
         static const Vector2 Right;
+        static const Vector2 NaN;
 
         float operator[](std::size_t index);
 
@@ -126,8 +129,8 @@ namespace LinearAlgebra {
         float x = 0;
         float y = 0;
 #else
-        const float x = 0;
-        const float y = 0;
+         float x = 0;
+         float y = 0;
 #endif
     };
 }