[PATCH 3/4] mf: Don't try to clone non existent topo connections.

[Bernhard Kölbl]

From: Bernhard Kölbl

---
 dlls/mf/topology.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/mf/topology.c b/dlls/mf/topology.c
index 25a00708100..b684b17ff72 100644
--- a/dlls/mf/topology.c
+++ b/dlls/mf/topology.c
@@ -712,7 +712,12 @@ static HRESULT WINAPI topology_CloneFrom(IMFTopology *iface, IMFTopology *src)
         for (j = 0; j < outputs->count; ++j)
         {
             DWORD input_index = outputs->streams[j].connection_stream;
-            TOPOID id = outputs->streams[j].connection->id;
+            TOPOID id;
+
+            if (!outputs->streams[j].connection)
+                continue;
+
+            id = outputs->streams[j].connection->id;

/* Skip node lookup in destination topology, assuming same node order. */
             if (SUCCEEDED(hr = topology_get_node_by_id(topology, id, &node)))