WinSDK samples: Workaround warnings for Clang on Windows.

Samples/multimedia/directshow/baseclasses/wxdebug.cpp

Index: Samples/multimedia/directshow/baseclasses/wxdebug.cpp
diff --git a/Samples/multimedia/directshow/baseclasses/wxdebug.cpp b/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
index 3c433031940bd7d77100e1eb5435844fe64ff618..57638912f452ed27c296f625b3295a2fe6d16320 100644
--- a/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
+++ b/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
@@ -1234,7 +1234,7 @@ CDisp::CDisp(IUnknown *pUnk)
     hr = pUnk->QueryInterface(IID_IPin, (void **)&pp);
     if(SUCCEEDED(hr))
     {
-        CDisp::CDisp(pp);
+        CDisp::CDisp(static_cast<IPin*>(pp));

[tommi, 2015/12/15 16:39:47]

hmm.. pp is already IPin*.  Why is this cast needed?

[kjellander_webrtc, 2015/12/15 17:57:55]

henrika@ and I were wondering that too. The compiler couldn't match any of the
available CDisp constructors without the cast. 
It kept complaining about that this line was trying to call a constructor with
no arguments.

         pp->Release();
         return;
     }