[Bug 26497] New: Lost Saga downloader fails because IsValidURL doesn't like first parameter

http://bugs.winehq.org/show_bug.cgi?id=26497

Summary: Lost Saga downloader fails because IsValidURL doesn't
                    like first parameter
           Product: Wine
           Version: 1.3.16
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: urlmon
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

In
http://appdb.winehq.org/objectManager.php?sClass=version&iId=21165
it says the app's downloader fails.  This still happens with current git.
One sees
fixme:urlmon:IsValidURL (0x163f98,
L"http://static.ogplanet.com/static/Launcher/us/1120/ogpupdate.exe", 0): stub
and a dialog box saying that download failed.

msdn says IsValidURL ignores its first parameter, but we were
returning an error if the first parameter was not null.
Removing that check lets the app download properly
and start it's launcher.