Make caesar and pom WARNS 6 clean. While there, use prototypes everywhere.

PR:	62456

games/caesar/Makefile

@@ -8,6 +8,6 @@ SCRIPTS=rot13.sh
 MAN=	caesar.6
 MLINKS=	caesar.6 rot13.6
 
-WARNS?=	2
+WARNS?=	6
 
 .include <bsd.prog.mk>

games/caesar/caesar.c

@@ -80,9 +80,7 @@ double stdf[26] = {
 void printit(char *);
 
 int
-main(argc, argv)
-	int argc;
-	char **argv;
+main(int argc, char **argv)
 {
 	int ch, dot, i, nread, winnerdot = 0;
 	char *inbuf;
@@ -153,8 +151,8 @@ main(argc, argv)
 	exit(0);
 }
 
-void printit(arg)
-	char *arg;
+void
+printit(char *arg)
 {
 	int ch, rot;
 

games/pom/Makefile

@@ -6,6 +6,6 @@ MAN=	pom.6
 DPADD=	${LIBM}
 LDADD=	-lm
 
-WARNS?=	2
+WARNS?=	6
 
 .include <bsd.prog.mk>

games/pom/pom.c

@@ -78,7 +78,7 @@ static double	dtor(double);
 static double	potm(double);
 
 int
-main()
+main(void)
 {
 	time_t tt;
 	struct tm *GMT;
@@ -122,8 +122,7 @@ main()
  *	return phase of the moon
  */
 static double
-potm(days)
-	double days;
+potm(double days)
 {
 	double N, Msol, Ec, LambdaSol, l, Mm, Ev, Ac, A3, Mmprime;
 	double A4, lprime, V, ldprime, D, Nm;
@@ -159,8 +158,7 @@ potm(days)
  *	convert degrees to radians
  */
 static double
-dtor(deg)
-	double deg;
+dtor(double deg)
 {
 	return(deg * PI / 180);
 }
@@ -170,8 +168,7 @@ dtor(deg)
  *	adjust value so 0 <= deg <= 360
  */
 static void
-adj360(deg)
-	double *deg;
+adj360(double *deg)
 {
 	for (;;)
 		if (*deg < 0)