ci: fix compilation of term.ui examples on windows

vlib/rand/rand.v

@@ -71,6 +71,11 @@ pub fn intn(max int) int {
 	return default_rng.intn(max)
 }
 
+// byte returns a uniformly distributed pseudorandom 8-bit unsigned positive `byte`.
+pub fn byte() byte {
+	return byte(default_rng.intn(256))
+}
+
 // int_in_range returns a uniformly distributed pseudorandom  32-bit signed int in range `[min, max)`.
 // Both `min` and `max` can be negative, but we must have `min < max`.
 pub fn int_in_range(min int, max int) int {

vlib/rand/random_numbers_test.v

@@ -175,3 +175,16 @@ fn test_rand_f64_in_range() {
 		assert value < max
 	}
 }
+
+fn test_rand_byte() {
+	mut all := []byte{}
+	for _ in 0 .. 256 {
+		x := rand.byte()
+		assert x >= 0
+		assert x <= 255
+		all << x
+	}
+	all.sort(a < b)
+	assert all[0] != all[255]
+	assert all[0] != all[128]
+}

vlib/term/ui/input_windows.c.v

@@ -12,7 +12,7 @@ pub fn init(cfg Config) &Context {
 	return &Context{}
 }
 
-pub fn (mut ctx Context) run() {
+pub fn (mut ctx Context) run() ? {
 	panic(not_implemented_yet)
 }