examples: fix unsafe 0

examples/clock/clock.v

@@ -42,7 +42,7 @@ struct App {
 	minute_hand []f32 = [f32(334.25), 40.25, 350, 24.5, 365.75, 40.25, 365.75, 427, 334.25, 427]
 	second_hand []f32 = [f32(345.8), 38.5, 350, 34.3, 354.2000, 38.5, 358.75, 427, 341.25, 427]
 mut:
-	gg        &gg.Context = 0
+	gg        &gg.Context = unsafe { 0 }
 	draw_flag bool        = true
 	dpi_scale f32 = 1.0
 }

examples/fireworks/fireworks.v

@@ -6,8 +6,8 @@ import rand
 
 struct App {
 mut:
-	gg      &gg.Context       = 0
-	ui      &objects.UIParams = 0
+	gg      &gg.Context       = unsafe { 0 }
+	ui      &objects.UIParams = unsafe { 0 }
 	rockets []objects.Rocket
 	frames  [][]objects.Rocket
 	// i thought about using a fixed fifo queue for the frames but the array

examples/gg/mandelbrot.v

@@ -31,7 +31,7 @@ fn (v &ViewRect) height() f64 {
 
 struct AppState {
 mut:
-	gg      &gg.Context = 0
+	gg      &gg.Context = unsafe { 0 }
 	iidx    int
 	pixels  &u32     = unsafe { vcalloc(pwidth * pheight * sizeof(u32)) }
 	npixels &u32     = unsafe { vcalloc(pwidth * pheight * sizeof(u32)) } // all drawing happens here, results are swapped at the end

examples/gg/random.v

@@ -9,7 +9,7 @@ const pbytes = 4
 
 struct AppState {
 mut:
-	gg          &gg.Context = 0
+	gg          &gg.Context = unsafe { 0 }
 	istream_idx int
 	pixels      [pheight][pwidth]u32
 }

examples/pendulum-simulation/modules/sim/anim/app.v

@@ -19,7 +19,7 @@ pub:
 	request_chan chan &sim.SimRequest
 	result_chan  chan &sim.SimResult
 pub mut:
-	gg     &gg.Context = 0
+	gg     &gg.Context = unsafe { 0 }
 	iidx   int
 	pixels []u32
 }

examples/term.ui/cursor_chaser.v

@@ -18,7 +18,7 @@ struct Point {
 
 struct App {
 mut:
-	tui       &tui.Context = 0
+	tui       &tui.Context = unsafe { 0 }
 	points    []Point
 	color     tui.Color = colors[0]
 	color_idx int

examples/term.ui/pong.v

@@ -19,11 +19,11 @@ const (
 [heap]
 struct App {
 mut:
-	tui    &ui.Context = 0
+	tui    &ui.Context = unsafe { 0 }
 	mode   Mode        = Mode.menu
 	width  int
 	height int
-	game   &Game = 0
+	game   &Game = unsafe { 0 }
 	dt     f32
 	ticks  i64
 }

vlib/net/smtp/smtp.v

@@ -32,7 +32,7 @@ pub enum BodyType {
 pub struct Client {
 mut:
 	conn     net.TcpConn
-	ssl_conn &openssl.SSLConn = 0
+	ssl_conn &openssl.SSLConn = unsafe { 0 }
 	reader   io.BufferedReader
 pub:
 	server   string

vlib/picohttpparser/response.v

@@ -3,8 +3,8 @@ module picohttpparser
 pub struct Response {
 	fd int
 pub:
-	date      &u8 = 0
-	buf_start &u8 = 0
+	date      &u8 = unsafe { 0 }
+	buf_start &u8 = unsafe { 0 }
 pub mut:
 	buf &u8 = 0
 }