cppcheck: fix uselessAssignmentPtrArg

Change-Id: I260bb1207cebb8cefb52fe1db3f51b63239b25a7
Reviewed-on: https://gerrit.libreoffice.org/3873Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>

sc/source/core/tool/consoli.cxx

@@ -420,7 +420,7 @@ static void lcl_InitArray( ScSubTotalFunc eFunc,
 }
 
 static double lcl_CalcData( ScSubTotalFunc eFunc,
-                        double fCount, double fSum, double fSumSqr)
+                        double& fCount, double fSum, double fSumSqr)
 {
     if (fCount < 0.0)
         return 0.0;