xgb-image: fix visual searching

prototypes/xgb-image.go

@@ -115,6 +115,7 @@ func main() {
 
 	// XXX: We don't /need/ alpha here, it's just a minor improvement--affects
 	// the backpixel value. (And we reject it in 30-bit depth anyway.)
+Depths:
 	for _, i := range screen.AllowedDepths {
 		for _, v := range i.Visuals {
 			// TODO: Could/should check other parameters, e.g., the RGB masks.
@@ -124,7 +125,7 @@ func main() {
 			if i.Depth == 32 || i.Depth == 30 && prefer30 {
 				visual, depth = v.VisualId, i.Depth
 				if !prefer30 || i.Depth == 30 {
-					break
+					break Depths
 				}
 			}
 		}