Compile pgenmain.c and printgrammar.c with PGEN defined
diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
index 88fa7f1..4b7b55a 100644
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -13,6 +13,8 @@
- check for duplicate definitions of names (instead of fatal err)
*/
+#define PGEN
+
#include "Python.h"
#include "pgenheaders.h"
#include "grammar.h"
diff --git a/Parser/printgrammar.c b/Parser/printgrammar.c
index 01f552f..dd7e6ae 100644
--- a/Parser/printgrammar.c
+++ b/Parser/printgrammar.c
@@ -1,6 +1,8 @@
/* Print a bunch of C initializers that represent a grammar */
+#define PGEN
+
#include "pgenheaders.h"
#include "grammar.h"