suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/applets/busybox.c b/applets/busybox.c
index 79634f9..99af9ca 100644
--- a/applets/busybox.c
+++ b/applets/busybox.c
@@ -73,6 +73,7 @@
 	bb_error_msg_and_die("applet not found");
 }
 
+int busybox_main(int argc, char **argv);
 int busybox_main(int argc, char **argv)
 {
 	/*