Image missing success.png

Hi, i am using the latest version and i found an image missing(?), not sure, the image is in css

.woocommerce a.button.added:before,
.woocommerce-page a.button.added:before,
.woocommerce button.button.added:before,
.woocommerce-page button.button.added:before,
.woocommerce input.button.added:before,
.woocommerce-page input.button.added:before,
.woocommerce #respond input#submit.added:before,
.woocommerce-page #respond input#submit.added:before,
.woocommerce #content input.button.added:before,
.woocommerce-page #content input.button.added:before {
  content: "";
  position: absolute;
  height: 16px;
  width: 16px;
  top: 0.35em;
  right: -26px;
  text-indent: 0;
  background: url(../img/success.png) no-repeat;
}

and i cannot find it in the theme, am i missing something?

thanks