[Quartz] Enable querying of IID_FilterGraph interface from filtergraph manager

[Christian Costa]

Forget my previous mail. I sent the wrong attachment.

Changelog:
Enable querying of IID_FilterGraph interface from filtergraph manager 
(spotted by Robert Reif).

Christian Costa   titan.costa at wanadoo.fr

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Index: filtergraph.c
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RCS file: /home/wine/wine/dlls/quartz/filtergraph.c,v
retrieving revision 1.11
diff -u -r1.11 filtergraph.c
--- filtergraph.c	5 Apr 2004 20:16:35 -0000	1.11
+++ filtergraph.c	29 Apr 2004 17:05:33 -0000
@@ -182,6 +182,7 @@
     TRACE("(%p)->(%s (%p), %p)\n", This, debugstr_guid(riid), riid, ppvObj);
     
     if (IsEqualGUID(&IID_IUnknown, riid) ||
+	IsEqualGUID(&IID_IFilterGraph, riid) ||
 	IsEqualGUID(&IID_IGraphBuilder, riid)) {
         *ppvObj = &(This->IGraphBuilder_vtbl);
         TRACE("   returning IGraphBuilder interface (%p)\n", *ppvObj);