Mass ANSIfication.

Work around intrcheck.c's desire to pass 'PyErr_CheckSignals' to
'Py_AddPendingCall' by providing a (static) wrapper function that has the
right number of arguments.
diff --git a/Parser/listnode.c b/Parser/listnode.c
index c7d5cfa..68f28bf 100644
--- a/Parser/listnode.c
+++ b/Parser/listnode.c
@@ -19,8 +19,7 @@
 static void listnode(FILE *, node *);
 
 void
-PyNode_ListTree(n)
-	node *n;
+PyNode_ListTree(node *n)
 {
 	listnode(stdout, n);
 }
@@ -28,9 +27,7 @@
 static int level, atbol;
 
 static void
-listnode(fp, n)
-	FILE *fp;
-	node *n;
+listnode(FILE *fp, node *n)
 {
 	level = 0;
 	atbol = 1;
@@ -38,9 +35,7 @@
 }
 
 static void
-list1node(fp, n)
-	FILE *fp;
-	node *n;
+list1node(FILE *fp, node *n)
 {
 	if (n == 0)
 		return;