py: Change macro var args in parser to be C99 compliant.
diff --git a/py/compile.c b/py/compile.c
index 2aa9850..4bbdf9a 100644
--- a/py/compile.c
+++ b/py/compile.c
@@ -23,7 +23,7 @@
 
 typedef enum {
     PN_none = 0,
-#define DEF_RULE(rule, comp, kind, arg...) PN_##rule,
+#define DEF_RULE(rule, comp, kind, ...) PN_##rule,
 #include "grammar.h"
 #undef DEF_RULE
     PN_maximum_number_of,