Update dataTables.fixedHeader.js

[delta1186]

Use the inline css width property if it exists as the new column width due to the width() function not always returning the correct value.

I am guessing if you accept this request, then you can apply it to other packages if needed and also update the version and minimize.

[DataTables]

This is repo to send pull results please. The repo here is just an automatically built derivative of it.

Also, could you send me a test case showing the patch fixing the issue at hand? The CSS width can be overridden by the browser, for example if the content of the cell won't fit into the given width and can't be broken down. Using the actual rendered width should be more accurate.