quartz: Set *ppvObject to NULL if QueryInterface fails.

dlls/quartz/enummoniker.c

@@ -89,6 +89,7 @@ static HRESULT WINAPI EnumMonikerImpl_QueryInterface(
         return S_OK;
     }
 
+    *ppvObj = NULL;
     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
     return E_NOINTERFACE;
 }

dlls/quartz/main.c

@@ -89,6 +89,7 @@ DSCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
 	return S_OK;
     }
 
+    *ppobj = NULL;
     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
     return E_NOINTERFACE;
 }

dlls/quartz/systemclock.c

@@ -210,6 +210,7 @@ static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REF
     return S_OK;
   }
   
+  *ppobj = NULL;
   WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
   return E_NOINTERFACE;
 }

dlls/quartz/tests/referenceclock.c

@@ -38,9 +38,7 @@ static void test_IReferenceClock_query_interface(const char * clockdesc, IRefere
 
     hr = IReferenceClock_QueryInterface(pClock, &IID_IDirectDraw, (LPVOID *)&pF);
     ok(hr == E_NOINTERFACE, "IReferenceClock_QueryInterface returned %x\n", hr);
-    todo_wine {
     ok(pF == NULL, "pF is not NULL\n");
-    }
 
     hr = IReferenceClock_QueryInterface(pClock, &IID_IReferenceClock, (LPVOID *)&pF);
     ok(hr == S_OK, "IReferenceClock_QueryInterface returned %x\n", hr);