VM runtime now maintains a heap internally

Now need to create some instructions which manage the heap

vm/runtime.h

@@ -16,6 +16,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include <lib/heap.h>
 #include <lib/inst.h>
 
 typedef enum
@@ -45,6 +46,7 @@ typedef struct
     byte *data;
     word ptr, max;
   } stack;
+  heap_t heap;
   struct Program
   {
     inst_t *instructions;
@@ -56,8 +58,9 @@ err_t vm_execute(vm_t *);
 err_t vm_execute_all(vm_t *);
 
 void vm_load_stack(vm_t *, byte *, size_t);
-void vm_load_program(vm_t *, inst_t *, size_t);
 void vm_load_registers(vm_t *, registers_t);
+void vm_load_heap(vm_t *, heap_t);
+void vm_load_program(vm_t *, inst_t *, size_t);
 void vm_stop(vm_t *);
 
 // Print routines