sc: Calculate the value only once for micro-optimization

Change-Id: I394bca979d4b914d6b6997837fab636b9bc4e479
Reviewed-on: https://gerrit.libreoffice.org/61879
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/sc/source/core/tool/interpr5.cxx b/sc/source/core/tool/interpr5.cxx
index 2b30f4e..b1c840e 100644
--- a/sc/source/core/tool/interpr5.cxx
+++ b/sc/source/core/tool/interpr5.cxx
@@ -1861,8 +1861,11 @@ double lcl_GetColumnMaximumNorm(const ScMatrixRef& pMatA, SCSIZE nC, SCSIZE nR, 
{
    double fNorm = 0.0;
    for (SCSIZE row=nR; row<nN; row++)
        if (fNorm < fabs(pMatA->GetDouble(nC,row)))
            fNorm = fabs(pMatA->GetDouble(nC,row));
    {
        double fVal = fabs(pMatA->GetDouble(nC,row));
        if (fNorm < fVal)
            fNorm = fVal;
    }
    return fNorm;
}

@@ -1872,8 +1875,11 @@ double lcl_TGetColumnMaximumNorm(const ScMatrixRef& pMatA, SCSIZE nR, SCSIZE nC,
{
    double fNorm = 0.0;
    for (SCSIZE col=nC; col<nN; col++)
        if (fNorm < fabs(pMatA->GetDouble(col,nR)))
            fNorm = fabs(pMatA->GetDouble(col,nR));
    {
        double fVal = fabs(pMatA->GetDouble(col,nR));
        if (fNorm < fVal)
            fNorm = fVal;
    }
    return fNorm;
}