Fix prototypes generated by makesetup, so they include '(void)' rather than
empty argumentlists.
diff --git a/Modules/config.c.in b/Modules/config.c.in
index 106b084..da7cabb 100644
--- a/Modules/config.c.in
+++ b/Modules/config.c.in
@@ -20,8 +20,8 @@
 
 /* -- ADDMODULE MARKER 1 -- */
 
-extern void PyMarshal_Init();
-extern void initimp();
+extern void PyMarshal_Init(void);
+extern void initimp(void);
 
 struct _inittab _PyImport_Inittab[] = {