examples/2048: make tiles have rounded corners (#7763)

vlib/gg/gg.v

@@ -54,6 +54,7 @@ pub:
 	// wait_events       bool // set this to true for UIs, to save power
 	fullscreen            bool
 	scale                 f32 = 1.0
+	sample_count          int
 	// vid needs this
 	// init_text bool
 	font_path             string
@@ -253,6 +254,7 @@ pub fn new_context(cfg Config) &Context {
 		html5_canvas_name: cfg.window_title.str
 		width: cfg.width
 		height: cfg.height
+		sample_count: cfg.sample_count
 		high_dpi: true
 		fullscreen: cfg.fullscreen
 	}