tdf#118716 Inner border of an embedded table can't be dragged around

regression from
    commit f14b9d30
    convert (a>b?a:b) to std::max(a,b)

In this code
   int a;
   std::max<sal_uInt16>(a,0)
std::max will first convert a and b to sal_uInt16, therefore potentially
converting a negative number to a positive number due to the conversion
rules. Then it will take the larger number.

While this code
    int a;
    static_cast<sal_uInt16>(a > 0 ? a : 0)
will compare first, and then convert the larger number to sal_uInt16,
which might result in making a "a" that is larger than 2^16 into a
smaller value, but which will never convert a negative "a" value into a
positive value.

Change-Id: Id4f6df0089b1a74ea4ac1c5d05655e7c1d8f0c7f
Reviewed-on: https://gerrit.libreoffice.org/57846
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/core/text/porfld.cxx

@@ -828,7 +828,7 @@ bool SwGrfNumPortion::Format( SwTextFormatInfo &rInf )
     const bool bFull = rInf.Width() < rInf.X() + Width();
     const bool bFly = rInf.GetFly() ||
         ( rInf.GetLast() && rInf.GetLast()->IsFlyPortion() );
-    SetAscent( std::max<sal_uInt16>(GetRelPos(), 0) );
+    SetAscent( GetRelPos() > 0 ? GetRelPos() : 0 );
     if( GetAscent() > Height() )
         Height( GetAscent() );
 

sw/source/uibase/uiview/viewtab.cxx

@@ -1700,8 +1700,8 @@ void SwView::StateTabWin(SfxItemSet& rSet)
                 const int nRgt = (bTableVertical ? nPageHeight : nPageWidth) -
                                  (aTabCols.GetLeftMin() + aTabCols.GetRight());
 
-                const sal_uInt16 nL = std::max< sal_uInt16 >(nLft, 0);
-                const sal_uInt16 nR = std::max< sal_uInt16 >(nRgt, 0);
+                const sal_uInt16 nL = static_cast< sal_uInt16 >(std::max(nLft, 0));
+                const sal_uInt16 nR = static_cast< sal_uInt16 >(std::max(nRgt, 0));
 
                 SvxColumnItem aColItem(nNum, nL, nR);
 
@@ -1937,8 +1937,8 @@ void SwView::StateTabWin(SfxItemSet& rSet)
                 const int nRgt = (bVerticalWriting ? nPageWidth : nPageHeight) -
                                  (aTabCols.GetLeftMin() + aTabCols.GetRight());
 
-                const sal_uInt16 nL = std::max< sal_uInt16 >(nLft, 0);
-                const sal_uInt16 nR = std::max< sal_uInt16 >(nRgt, 0);
+                const sal_uInt16 nL = static_cast< sal_uInt16 >(std::max(nLft, 0));
+                const sal_uInt16 nR = static_cast< sal_uInt16 >(std::max(nRgt, 0));
 
                 SvxColumnItem aColItem(0, nL, nR);
 
@@ -2011,8 +2011,8 @@ void SwView::StateTabWin(SfxItemSet& rSet)
                     const int nLft = aTabCols.GetLeftMin() + aTabCols.GetLeft();
                     const int nRgt = nPageWidth -(aTabCols.GetLeftMin() + aTabCols.GetRight());
 
-                    const sal_uInt16 nL = std::max< sal_uInt16 >(nLft, 0);
-                    const sal_uInt16 nR = std::max< sal_uInt16 >(nRgt, 0);
+                    const sal_uInt16 nL = static_cast< sal_uInt16 >(std::max(nLft, 0));
+                    const sal_uInt16 nR = static_cast< sal_uInt16 >(std::max(nRgt, 0));
 
                     aRectangle.SetLeft( nL );
                     if(nNum > 1)