removed field 'n' from 'CallInfo' (not being used right now)

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.126 2015/11/02 11:43:17 roberto Exp roberto $
+** $Id: lstate.h,v 2.127 2015/11/02 16:01:41 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -78,7 +78,6 @@ typedef struct CallInfo {
     } c;
   } u;
   ptrdiff_t extra;
-  unsigned short n;  /* ordinal number in call list */
   short nresults;  /* expected number of results from this function */
   lu_byte callstatus;
 } CallInfo;