Bugfix: getWebGLCtx was returning false on supported environments

[pmarfany]

Hi!

I'm updating my code to use the new release of this library and I came across a compatibility problem with IE11 (not that we care a lot, but a lot of people on our website actually use it 😅).

Anyway, the visor was throwing an error indicating that WebGL was not supported, which was weird as we are using another library that uses it without any problem.

After taking a look at the code, it appears that the following fragment inside the getWebGLCtx method always returns after the first element inside the names array (some checks for the first "truthful").

const names = ['webgl', 'experimental-webgl', 'moz-webgl', 'webkit-3d'];

[...code...]

names.some((name) => {
  try {
    context = canvas.getContext(name);
    return true;
  }
  catch (e) {
    return false;
  }
});

According to the HTMLCanvasStandard, the getContext method will just return null if the context is not supported, thus always returning true to the webgl context (the first one in the array) even if it's not supported.

This PR changes the returning condition to check if the value is different from null.

Merge request checklist

• I read the guidelines for contributing
• I created my branch from dev and I am issuing the PR to dev
• Unit tests are OK

[mistic100]

Thank you