rand: change rand.seed() to receive seed value

examples/tetris/tetris.v

@@ -140,7 +140,7 @@ fn main() {
 }
 
 fn (g mut Game) init_game() {
-	rand.seed()
+	rand.seed(time.now().uni)
 	g.generate_tetro()
 	g.field = []array_int // TODO: g.field = [][]int
 	// Generate the field, fill it with 0's, add -1's on each edge

examples/vcasino/VCasino.v

@@ -1,4 +1,5 @@
 import rand
+import time
 import os
 
 const (HelpText = ' Usage:\t./VCasino\n
@@ -87,7 +88,7 @@ fn get_bet(money int) int {
 }
 
 fn run_wheel(bet_nbr int, bet int) int {
-    rand.seed()
+    rand.seed(time.now().uni)
     winning_nbr := rand.next(50)
     print('Roulette Wheel spinning... and stops on the number $winning_nbr which is a ')
     if winning_nbr % 2 == 1 {