new valgrind errors in qedit / quartz

[Dan Kegel]

Hi Maarten,
your recent changes may have triggered new valgrind warnings in qedit,
could you have a look?

http://kegel.com/wine/valgrind/logs-2008-06-27/vg-qedit_mediadet-diff.txt

+ Conditional jump or move depends on uninitialised value(s)
+    at  FilterGraph2_RemoveFilter (filtergraph.c:463)
+    by  FilterGraphInner_Release (filtergraph.c:295)
+    by  Filtergraph_Release (filtergraph.c:5354)
+    by  FilterGraph2_Release (filtergraph.c:341)
+    by  MD_cleanup (mediadet.c:54)
+    by  MediaDet_Release (mediadet.c:76)
+    by  test_mediadet (mediadet.c:224)
+    by  func_mediadet (mediadet.c:307)
+    by  run_test (test.h:449)
+    by  main (test.h:498)
+  Uninitialised value was created by a client request
+    at  mark_block_uninitialized (heap.c:164)
+    by  RtlAllocateHeap (heap.c:1239)
+    by  IMalloc_fnAlloc (ifs.c:186)
+    by  CoTaskMemAlloc (ifs.c:562)
+    by  AsyncReader_create (filesource.c:346)
+    by  DSCF_CreateInstance (main.c:129)
+    by  CoCreateInstance (compobj.c:2408)
+    by  FilterGraph2_AddSourceFilter (filtergraph.c:1499)
+    by  MediaDet_put_Filename (mediadet.c:446)
+    by  test_mediadet (mediadet.c:149)
+    by  func_mediadet (mediadet.c:307)
+    by  run_test (test.h:449)
+    by  main (test.h:498)

...

+ Conditional jump or move depends on uninitialised value(s)
+    at  FilterGraph2_RemoveFilter (filtergraph.c:465)
+    by  FilterGraphInner_Release (filtergraph.c:295)
+    by  Filtergraph_Release (filtergraph.c:5354)
...