mfreadwrite/reader: Release device manager in source_reader_release.

dlls/mfreadwrite/reader.c

@@ -211,6 +211,8 @@ static ULONG source_reader_release(struct source_reader *reader)
 
     if (!refcount)
     {
+        if (reader->device_manager)
+            IUnknown_Release(reader->device_manager);
         if (reader->async_callback)
             IMFSourceReaderCallback_Release(reader->async_callback);
         if (reader->descriptor)

dlls/mfreadwrite/tests/mfplat.c

@@ -1406,7 +1406,7 @@ static void test_reader_d3d9(void)
     IMFSourceReader_Release(reader);
 
     refcount = IDirect3DDeviceManager9_Release(d3d9_manager);
-    todo_wine ok(!refcount, "Unexpected refcount %lu.\n", refcount);
+    ok(!refcount, "Unexpected refcount %lu.\n", refcount);
 
     IDirect3DDevice9_Release(d3d9_device);