eris: upgrade flagbits to 16 bits

luprex/eris-master/src/lobject.h

@@ -556,8 +556,8 @@ typedef struct Node {
 typedef struct Table {
   CommonHeader;
   lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
-  lu_byte flagbits;  /* flag bits reserved for the user */
   lu_byte lsizenode;  /* log2 of size of `node' array */
+  unsigned short flagbits;  /* flag bits reserved for the user */
   int sizearray;  /* size of `array' array */
   int nnkeys;     /* number of non-nil keys in both array and hash */
   int lastdelseq;  /* sequence number of last deleted */