Now that prototypes are in scope, the compiler gives legit wngs

about int size mismatches at two calls to s_rand.  Stuffed in
casts to make the code do what it did before but w/o warnings --
although unclear that's correct!

Modules/rotormodule.c

@@ -330,8 +330,8 @@ RTR_init(Rotorobj *r)
 	RTR_e_rotors(r);
 	RTR_d_rotors(r);
 	for (i = 0; i < r->rotors; i++) {
-		r->positions[i] = (unsigned char) r_rand(r,r->size);
-		r->advances[i] = (1+(2*(r_rand(r,r->size/2))));
+		r->positions[i] = (unsigned char) r_rand(r, (short)r->size);
+		r->advances[i] = (1+(2*(r_rand(r, (short)(r->size/2)))));
 		RTR_permute_rotor(r,
 				  &(r->e_rotor[(i*r->size)]),
 				  &(r->d_rotor[(i*r->size)]));