shell32: Check IsWoW64Process before calling Wow64 functions (resent)

[Olivier F. R. Dierick]

Avoid calling WoW64 functions on non-WoW64 systems, to prevent unwanted
ERROR_CALL_NOT_IMPLEMENTED error to be thrown.

Should fix bug 36838.

Signed-off-by: Olivier F. R. Dierick <o.dierick at piezo-forte.be>
---
 dlls/shell32/shfldr_unixfs.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

-- 
        Olivier F. R. Dierick
        o.dierick at piezo-forte.be
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