strmbase: Don't pass NULL fetched parameter in BaseOutputPinImpl_Connect on…

dlls/strmbase/pin.c

@@ -419,6 +419,9 @@ HRESULT WINAPI BaseOutputPinImpl_Connect(IPin * iface, IPin * pReceivePin, const
     TRACE("(%p/%p)->(%p, %p)\n", This, iface, pReceivePin, pmt);
     dump_AM_MEDIA_TYPE(pmt);
 
+    if (!pReceivePin)
+        return E_POINTER;
+
     /* If we try to connect to ourselves, we will definitely deadlock.
      * There are other cases where we could deadlock too, but this
      * catches the obvious case */
@@ -465,9 +468,11 @@ HRESULT WINAPI BaseOutputPinImpl_Connect(IPin * iface, IPin * pReceivePin, const
             /* then try receiver filter's media types */
             if (hr != S_OK && SUCCEEDED(hr = IPin_EnumMediaTypes(pReceivePin, &pEnumCandidates))) /* if we haven't already connected successfully */
             {
+                ULONG fetched;
+
                 hr = VFW_E_NO_ACCEPTABLE_TYPES; /* Assume the worst, but set to S_OK if connected successfully */
 
-                while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, NULL))
+                while (S_OK == IEnumMediaTypes_Next(pEnumCandidates, 1, &pmtCandidate, &fetched))
                 {
                     assert(pmtCandidate);
                     dump_AM_MEDIA_TYPE(pmtCandidate);