Varag parameter is a new kind of variable

To allow some optimizations on its use.

lobject.h

@@ -584,8 +584,8 @@ typedef struct AbsLineInfo {
 ** Flags in Prototypes
 */
 #define PF_ISVARARG	1  /* function is vararg */
-#define PF_VATAB	2  /* function is vararg with table */
-#define PF_VAPTAB	4  /* function is vararg with pseudo-table */
+#define PF_VAVAR	2  /* function has vararg parameter */
+#define PF_VATAB	4  /* function has vararg table */
 #define PF_FIXED	8  /* prototype has parts in fixed memory */