Fixed command error handling

uncanny/display.go

@@ -31,7 +31,10 @@ func (c *Can) DisplayWrite(line int, a []byte) error {
 	// print in separate chunks, as one frame payload is limited to 7 bytes
 	// the display has only 16 characters per line, so we truncate there
 	for i := 0; i < len(a) && i < 16; i += 7 {
-		return c.bus.Publish(DisplayCommand{addr, a[i:i+7]}.Encode())
+		err := c.bus.Publish(DisplayCommand{addr, a[i:i+7]}.Encode())
+		if err != nil {
+			return err
+		}
 	}
 	return nil
 }