For the CR == 3 case, x29/x30 should be restored from x29, not from
sp, which may have been decremented further for local stack storage.

This fixes uwinding the stack for C++ exceptions in code generated
by MSVC.
Signed-off-by: Martin Storsjo <martin@martin.st>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>