blacklist ocGetPivotData for calc's threading

There appears to be a lot of caching involved in the code invoked
by ScGetPivotData(). Testcase is e.g. tdf#89186-1 (with minimal
formula size disabled again).

Change-Id: If7e2a972898c358dc8f80cf238f8d5ccf541f16d
Reviewed-on: https://gerrit.libreoffice.org/56525
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
diff --git a/sc/source/core/tool/token.cxx b/sc/source/core/tool/token.cxx
index 6593022..062cfc4 100644
--- a/sc/source/core/tool/token.cxx
+++ b/sc/source/core/tool/token.cxx
@@ -1324,7 +1324,8 @@ void ScTokenArray::CheckForThreading( const FormulaToken& r )
        ocDBSum,
        ocExternal,
        ocDde,
        ocWebservice
        ocWebservice,
        ocGetPivotData
    });

    // Don't enable threading once we decided to disable it.