suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/procps/pidof.c b/procps/pidof.c
index 1d97189..ea2520a 100644
--- a/procps/pidof.c
+++ b/procps/pidof.c
@@ -16,6 +16,7 @@
 	OPT_OMIT   = USE_FEATURE_PIDOF_OMIT(  (1<<OPTBIT_OMIT  )) + 0,
 };
 
+int pidof_main(int argc, char **argv);
 int pidof_main(int argc, char **argv)
 {
 	unsigned first = 1;