[Bug 47762] New: LoadStringA fails instead of returning const pointer to string if buffer length is zero

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47762

            Bug ID: 47762
           Summary: LoadStringA fails instead of returning const pointer
                    to string if buffer length is zero
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs at winehq.org
          Reporter: tsmx at tut.by
      Distribution: ---

https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-loadstringa

According to MSDN doc, LoadStringA should be able to return const pointer
without using allocated buffer if the buffer size is set to zero.

Here we see that Wine just returns -1 in that case:

https://source.winehq.org/git/wine.git/blob/refs/heads/master:/dlls/user32/resource.c#l303

Since there is something that looks legit in the LoadStringW just above, it
shouldn't be too hard to fix, amirite?

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