Can set parameters and specific cartridge through arguments option.

[taketin]

I wanted to set an optional parameter (for example -uiscale) and specific cartridge when initialize time on wasm.
Then I wrote the following code in Javascript.

<script type="text/javascript">
  var Module = {
    canvas: document.getElementById('canvas'),
    arguments: ["tetris.tic", "-uiscale", "1.5"]
  };
</script>

However, it couldn't work as my expected. An optional parameter was worked but didn't boot the cartridge.

I investigate the cause then found it. This p/r is my proposal.

My idea is that if argc[1] has .tic to suffix, we judge to it was given a cartridge.

Please take a look if you have time.
Regards.

[nesbox]

looks good
thank you

[nesbox]

sorry for the delay with the review

[taketin]

Thanks for merged it!