ANSIfy some more forward declarations.
diff --git a/Modules/dbmmodule.c b/Modules/dbmmodule.c
index cad99ba..b95c0ba 100644
--- a/Modules/dbmmodule.c
+++ b/Modules/dbmmodule.c
@@ -272,7 +272,7 @@
 };
 
 DL_EXPORT(void)
-initdbm() {
+initdbm(void) {
 	PyObject *m, *d;
 
 	m = Py_InitModule("dbm", dbmmodule_methods);