Seperated chart from box; fixed kkr segfault.

box.h

@@ -8,6 +8,7 @@
  
 #pragma once
 
+#include "chart.h"
 #include "ui.h"
 
 
@@ -27,18 +28,13 @@ struct box {
         /* button */
         char *name;
 
-        /* chart and vertical/horizontal box */
+        /* chart */
+        struct chart *chart;
+
+        /* vertical/horizontal  */
         struct {
-            /* chart and vertical/horizontal box */
             size_t length;
-
-            union {
-                /* vertical/horizontal box */
-                struct box **children;
-
-                /* chart */
-                double *prices;
-            };
+            struct box **children;
         };
     };
 };
@@ -47,7 +43,7 @@ struct box {
 struct box *new_button_box(char *name);
 struct box *new_vertical_box(void);
 struct box *new_horizontal_box(void);
-struct box *new_chart_box(void);
+struct box *new_chart_box(struct chart *);
 
 void append_box(struct box *parent, struct box *child);