[W519] False positive when an external function is defined

We just turned W519 on, since we now have the option to turn it off selectively. But there are false positives, when functions are pulled in from a dll.

The following line returns "FixInsight Warning] xxx.pas: W519 Method 'StrCmpLogicalW' is empty"

function StrCmpLogicalW; external 'shlwapi.dll' name 'StrCmpLogicalW';

Yes, there is no function body, but where should it come from? :)