Don't apply bakefile-1 Vim syntax to bakefile-0 XML files.
Don't apply bakefile-1 Vim syntax to bakefile-0 XML files.

Check if the .bkl file we're used for is actually an XML file and skip
handling it in this case as it must be a bakefile-0 and not current bakefile
file.

vslavik/bakefile,vslavik/bakefile,vslavik/bakefile