loplugin:casttovoid (clang-cl): extensions

Change-Id: I91eeddd37a745592a9aa0f0827f65db257e1dfad

extensions/source/activex/SOActiveX.cxx

@@ -986,8 +986,7 @@ HRESULT CSOActiveX::OnDrawAdvanced( ATL_DRAWINFO& di )
                 CComVariant dummyResult;
                 CComVariant aPropVar;
                 aPropVar.vt = VT_BOOL; aPropVar.boolVal = VARIANT_FALSE;
-                HRESULT hres = ExecuteFunc( mpDispFrame, L"close", &aPropVar, 1, &dummyResult );
-                (void)hres;
+                (void) ExecuteFunc( mpDispFrame, L"close", &aPropVar, 1, &dummyResult );
                 mpDispFrame = CComPtr<IDispatch>();
             }
 

extensions/source/ole/servprov.cxx

@@ -623,8 +623,7 @@ OleServer_Impl::OleServer_Impl( const Reference<XMultiServiceFactory>& smgr):
         a >>= m_bridgeSupplier;
     }
 
-    bool ret = provideInstance( m_smgr, const_cast<GUID*>(&OID_ServiceManager) );
-    (void)ret;
+    (void) provideInstance( m_smgr, const_cast<GUID*>(&OID_ServiceManager) );
 }
 
 OleServer_Impl::~OleServer_Impl()