$NetBSD$

Fix illegal C.

--- yearcal.c~	1998-10-13 16:52:20.000000000 +0000
+++ yearcal.c
@@ -16,7 +16,7 @@ char *montab[] = {
 , "December"
 } ;
 
-void main(argc,argv)
+int main(argc,argv)
 int argc;
 char **argv;
 {
