suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/util-linux/hexdump.c b/util-linux/hexdump.c
index 5cb245f..cddd185 100644
--- a/util-linux/hexdump.c
+++ b/util-linux/hexdump.c
@@ -51,6 +51,7 @@
 	{NULL, 0 }
 };
 
+int hexdump_main(int argc, char **argv);
 int hexdump_main(int argc, char **argv)
 {
 	const char *p;