[PATCH] ole32: Don't try to unregister window class if it was never registered.

[Jacek Caban]

UnregisterClass may load display driver, which is may be problematic
inside DLL_PROCESS_DETACH (esp. in Android drivers, which imports ole32
itself).

Signed-off-by: Jacek Caban 
---
 dlls/ole32/compobj.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)