amstream: Release pins and streams array on instance release (Valgrind).

dlls/amstream/amstream.c

@@ -114,6 +114,7 @@ static ULONG WINAPI IAMMultiMediaStreamImpl_Release(IAMMultiMediaStream* iface)
     {
         for(i = 0; i < This->nbStreams; i++)
             IAMMediaStream_Release(This->pStreams[i]);
+        CoTaskMemFree(This->pStreams);
         if (This->ipin)
             IPin_Release(This->ipin);
         if (This->media_stream_filter)

dlls/amstream/mediastreamfilter.c

@@ -249,6 +249,8 @@ static ULONG WINAPI MediaStreamFilterImpl_Release(IMediaStreamFilter *iface)
             IMediaStream_Release(This->streams[i]);
             IPin_Release(This->pins[i]);
         }
+        CoTaskMemFree(This->streams);
+        CoTaskMemFree(This->pins);
         BaseFilter_Destroy(&This->filter);
         HeapFree(GetProcessHeap(), 0, This);
     }