Full abstraction for representation of array values

lobject.h

@@ -736,12 +736,15 @@ typedef union Node {
 #define setnorealasize(t)	((t)->flags |= BITRAS)
 
 
+typedef struct ArrayCell ArrayCell;
+
+
 typedef struct Table {
   CommonHeader;
   lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
   lu_byte lsizenode;  /* log2 of size of 'node' array */
   unsigned int alimit;  /* "limit" of 'array' array */
-  TValue *array;  /* array part */
+  ArrayCell *array;  /* array part */
   Node *node;
   Node *lastfree;  /* any free position is before this position */
   struct Table *metatable;