Supplying an aspect ratio AND the transformation parameter causes poster URLs to fail #1087

cloudinary.videoPlayer("succeeds", {
  "cloud_name": "demo",
  "autoplay": false,
  "controls": true,
  "loop": false,
  "muted": false,
  "publicId": "dog",
  "showLogo": true,
  "width": "640",
  "height": "360",
  "aspectRatio": "640:360"
});

builds a poster image with URL https://res.cloudinary.com/demo/_applet_/video_service/elements/upload/ZG9n/poster?tx=ar_640%3A360%2Cc_limit%2Cw_1000&_s=vp (ar_640:360,c_limit,w_1000), which succeeds.

However,

cloudinary.videoPlayer("fails", {
  "cloud_name": "demo",
  "autoplay": false,
  "controls": true,
  "loop": false,
  "muted": false,
  "publicId": "dog",
  "transformation": [
    {
      "quality": "auto"
    }
  ],
  "showLogo": true,
  "width": "640",
  "height": "360",
  "aspectRatio": "640:360"
});

builds a poster image with URL https://res.cloudinary.com/demo/_applet_/video_service/elements/upload/ZG9n/poster?tx=q_auto%2Far_640%3A360%2Fc_limit%2Cw_1000&_s=vp (q_auto/ar_640:360/c_limit,w_1000) which returns x-cld-error: Crop mode scale requires specifying either width or height, because the ar transformation is slash-separated rather than comma-separated from the w_1000, so it becomes an independent scale operation without a width or height.

Test cases: https://codepen.io/editor/eeeps/pen/01a0a214-7f4d-79fb-b92d-0e022f701fac