'heatmapgl' with xaxis: { scaleanchor: 'y' } regression in 1.58.0

[wbrgss]

Codepen here (graph renders, but console error present in browser Dev Tools [not CodePen console])

With v1.58.0 and above, the heatmapgl trace in combination with layout.xaxis.scaleanchor = 'y' will result in the following console error:

Uncaught TypeError: Cannot read property 'h' of undefined
   at finalRatios (plotly-latest.js:130572)
    at enforce (plotly-latest.js:130607)
    at Scene2D.proto.plot (plotly-latest.js:141341)
    at Object.plot (plotly-latest.js:140826)
    at exports.drawData (plotly-latest.js:123232)
    at Object.lib.syncOrAsync (plotly-latest.js:112023)
    at Object.plot (plotly-latest.js:117778)
    at Object.newPlot (plotly-latest.js:118048)
    at pen.js?key=pen.js-7e54a372-bf12-b3ca-2352-8ef41ae0d8f6:16

It looks like the height h is not defined in the yRatio calculation here and this causes the error.

Also, probably because of the undefined height in a ratio calculation, the way a heatmap is rendered is different in a div without a defined width (or perhaps other dimensions?) before and after 1.58.0:

Plotly.js v1.57.1 ('equal' aspect ratio)	Plotly.js v1.58.0 ('oblong' aspect ratio)

---

This is more of a problem for Dash, because it's a render-blocking error.

Dash app (may require login)

Click for Python Dash code

import dash
import dash_core_components as dcc

app = dash.Dash(__name__)

layout = dict(xaxis=dict(scaleanchor='y'))
webgl_heatmap_fig = dict(
    data=[
        dict(
            z=[
                [1, 2, 3],
                [4, 5, 6],
                [7, 8, 9]
            ],
            type='heatmapgl'
        )
    ],
    layout=layout
)

app.layout = dcc.Graph(figure=webgl_heatmap_fig)

if __name__ == '__main__':
    app.run_server(debug=True)

cc @plotly/plotly_js