ajax-loader.gif missing width and/or height attributes

Looking at the jquery-validation-for-contact-form-7/jquery-validation-for-contact-form-7.php, the code doesn’t have height and width set. The following below is the code snippet:

function jvcf7_validation_js(){
  global $optionValues;
  echo '<script>
  	jvcf7_loading_url= "'.plugins_url('contact-form-7/images/ajax-loader.gif').'";
    jvcf7_invalid_field_design = "'.$optionValues["jvcf7_invalid_field_design"].'";
	jvcf7_show_label_error = "'.$optionValues["jvcf7_show_label_error"].'";
  </script>';

I tried adding height and width attributes but it ends up breaking other scripts within my WordPress theme. My example is as shown below:

jvcf7_loading_url= "'.plugins_url('contact-form-7/images/ajax-loader.gif').'" width="16px" height="16px";

If there is anyway to set the height and width of the image, that would help optimize my site. Thanks!

https://ww.wp.xz.cn/plugins/jquery-validation-for-contact-form-7/