suppress warnings about easch <applet>_main() having

no preceding prototype

miscutils/rx.c

@@ -248,6 +248,7 @@ static void sigalrm_handler(int ATTRIBUTE_UNUSED signum)
 {
 }
 
+int rx_main(int argc, char **argv);
 int rx_main(int argc, char **argv)
 {
 	char *fn;