db: use ANSI (void) function declarations
diff --git a/openbsc/include/openbsc/db.h b/openbsc/include/openbsc/db.h
index 37011a1..d0c85ea 100644
--- a/openbsc/include/openbsc/db.h
+++ b/openbsc/include/openbsc/db.h
@@ -31,8 +31,8 @@
 
 /* one time initialisation */
 int db_init(const char *name);
-int db_prepare();
-int db_fini();
+int db_prepare(void);
+int db_fini(void);
 
 /* subscriber management */
 struct gsm_subscriber *db_create_subscriber(struct gsm_network *net,