strmbase: Release the allocator in IPin::Disconnect() (Valgrind).

dlls/quartz/tests/videorenderer.c

@@ -1443,7 +1443,7 @@ static void test_connect_pin(void)
     ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#x.\n", hr);
 
     ref = IMemAllocator_Release(allocator);
-    todo_wine ok(!ref, "Got outstanding refcount %d.\n", ref);
+    ok(!ref, "Got outstanding refcount %d.\n", ref);
     IMemInputPin_Release(input);
     IPin_Release(pin);
     ref = IFilterGraph2_Release(graph);

dlls/quartz/tests/vmr9.c

@@ -3072,7 +3072,7 @@ static void test_renderless_formats(void)
         ok(hr == S_OK, "Test %u: Got hr %#x.\n", i, hr);
 
         hr = IMemInputPin_GetAllocator(input, &allocator);
-        todo_wine_if (i == 0) ok(hr == S_OK, "Test %u: Got hr %#x.\n", i, hr);
+        todo_wine ok(hr == S_OK, "Test %u: Got hr %#x.\n", i, hr);
         if (hr != S_OK)
         {
             test_allocator(input);

dlls/strmbase/pin.c

@@ -594,6 +594,13 @@ static HRESULT WINAPI source_Disconnect(IPin *iface)
             IMemInputPin_Release(This->pMemInputPin);
             This->pMemInputPin = NULL;
         }
+
+        if (This->pAllocator)
+        {
+            IMemAllocator_Release(This->pAllocator);
+            This->pAllocator = NULL;
+        }
+
         if (This->pin.peer)
         {
             IPin_Release(This->pin.peer);
@@ -930,6 +937,12 @@ static HRESULT WINAPI sink_Disconnect(IPin *iface)
         if (pin->pFuncsTable->sink_disconnect)
             pin->pFuncsTable->sink_disconnect(pin);
 
+        if (pin->pAllocator)
+        {
+            IMemAllocator_Release(pin->pAllocator);
+            pin->pAllocator = NULL;
+        }
+
         IPin_Release(pin->pin.peer);
         pin->pin.peer = NULL;
         FreeMediaType(&pin->pin.mt);