Initializing Aladin Lite with a "bad" HiPS dataset should display the default (DSS2 color)

[tboch]

In version 3.8.1, initializing Aladin Lite with a bad survey results in no HiPS showing at all.

var aladin;
A.init.then(() => {
    aladin = A.aladin('#aladin-lite-div', {target: 'LMC', fov: 55, survey: 'https://camarchepas.org'});

});

DSS2 color (default) should be displayed