loplugin:passstuffbyref improved return in various

Change-Id: I0a8282d8e0d9575b055243073fc89a7d6b67b560
Reviewed-on: https://gerrit.libreoffice.org/47173
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/formula/tokenarray.hxx b/include/formula/tokenarray.hxx
index 92c39bd4c60a..087f7eacb83f 100644
--- a/include/formula/tokenarray.hxx
+++ b/include/formula/tokenarray.hxx
@@ -182,7 +182,7 @@ public:
         return result;
     }
 
-    FormulaTokenArrayReferencesIterator operator++()
+    FormulaTokenArrayReferencesIterator const & operator++()
     {
         assert(maIter != maEnd);
         ++maIter;