ole32: prevent recursion when CLSIDFromString is passed empty string

[Andrey Turkin]

As pointed out by AF, there is really neat recursion when
CLSIDFromString tries to parse empty string - it calls CLSIDFromProgID
which reads HKCR\CLASSES\@ (which is empty) and calls CLSIDFromString
again to parse it. This patch fixes this and thus should fix bug 16999

---
 dlls/ole32/compobj.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)



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