Clang requires the __getReg function to be declared in addition to
be declared as an intrinsic with the pragma.

This fixes the following error:

../wine/include/winnt.h:2412:27: error: call to undeclared library function '__getReg' with type 'unsigned long long (int)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    return (struct _TEB *)__getReg(18);
                          ^
../wine/include/winnt.h:2412:27: note: include the header <intrin.h> or explicitly provide a declaration for '__getReg'
1 error generated.
Signed-off-by: Martin Storsjö <martin@martin.st>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54991

This fixes some crashes especially when dealing with very long C++ names
(like template classes).

Fortunately, dwarf internals don't require type lookup by name (eg.
on forward declaration), so the impact of thrashing some names is limited.

It's very likely native doesn't store directly these very long names
(it could either store the qualified mangled name - which can be way shorter
for template classes - or use the names in lexical hierarchy: both boil down
to storing less information, and recompute it (unmangle or class hierarchy
walk) upon request).
But this would need a proper C++ support in dbghelp. Not for today.
Signed-off-by: Eric Pouech <epouech@codeweavers.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

When the default desktop window is created, its parent is always NULL,
and SetDesktopWindow is never called here.

This doesn't create anything, but instead notifies the user driver of
the current desktop window, either when it is created, or when a thread
calling NtUserGetDesktopWindow receives the current desktop window.