Local paths without protocol / host part are not loaded

[losnir]

This is a bug introduced in v1.3.2, with the extractUrlParts function. When the path does not have a protocol / host part (local path) then the result of the regular expression inside that function would be undefined, and that would be prepended to the path, thus making it unable to be loaded.

Reproduction steps:

• Include the latest less.js inside your WebKit application (this was discovered in matthewdl/Crunch)
• Manually invoke the parser and the compiler:

var parser = new(less.Parser);

parser.parse('@import "files/demo.less";', function (err, tree) {
    if (err) { return console.error(err) }
    console.log(tree.toCSS());
});

The href variable inside loadStyleSheet function would be prepended with undefined, and the file would not be loaded (404).

[losnir]

Turns out the fix does not work for Unix paths - the / at the beginning is omitted.. The whole function is not programmed with local paths in mind. I'm trying to find an elegant solution that won't break anything else.

[losnir]

This should now work cross-platform.