replace PyXXX_Length calls with PyXXX_Size calls
diff --git a/Python/getargs.c b/Python/getargs.c
index ba855af..11754ef 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -348,7 +348,7 @@
 		return msgbuf;
 	}
 	
-	if ((i = PySequence_Length(arg)) != n) {
+	if ((i = PySequence_Size(arg)) != n) {
 		levels[0] = 0;
 		sprintf(msgbuf,
 		    toplevel ? "%d arguments, %d" : "%d-sequence, %d-sequence",