suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/coreutils/test.c b/coreutils/test.c
index d3d7604..6e0d5d3 100644
--- a/coreutils/test.c
+++ b/coreutils/test.c
@@ -578,6 +578,7 @@
 
 /* applet entry point */
 
+int test_main(int argc, char **argv);
 int test_main(int argc, char **argv)
 {
 	return bb_test(argc, argv);