Typo in browser compatibility code

[j-nava]

I believe there's a typo in Float32.js:

var r = new Float32Array(1); r[0] = s; return r[0];

should be

var r = new Float32Array(1); r[0] = x; return r[0];

[athanclark]

@j-nava Holy cow, you're absolutely right. Would you like to open a pull request?

[j-nava]

Sure, no problem. :)