coverity#1244939 Division or modulo by float zero

and

coverity#1244938 Division or modulo by float zero

Change-Id: I128b1ac10f514285152cf189af24885460c9c5ca

svx/source/customshapes/EnhancedCustomShapeFontWork.cxx

@@ -41,6 +41,7 @@
 #include <editeng/outlobj.hxx>
 #include <editeng/editobj.hxx>
 #include <editeng/editeng.hxx>
+#include <o3tl/numeric.hxx>
 #include <svx/svdmodel.hxx>
 #include <vector>
 #include <numeric>
@@ -741,8 +742,12 @@ void FitTextOutlinesToShapeOutlines( const tools::PolyPolygon& aOutlines2d, FWDa
                                 InsertMissingOutlinePoints( rOutlinePoly, vDistances, rTextAreaBoundRect, aLocalPoly );
                                 InsertMissingOutlinePoints( rOutlinePoly2, vDistances2, rTextAreaBoundRect, aLocalPoly );
 
-                                sal_uInt16 j, _nPointCount = aLocalPoly.GetSize();
-                                for ( j = 0; j < _nPointCount; j++ )
+                                sal_uInt16 _nPointCount = aLocalPoly.GetSize();
+                                if (_nPointCount)
+                                {
+                                    if (!nWidth || !nHeight)
+                                        throw o3tl::divide_by_zero();
+                                    for (sal_uInt16 j = 0; j < _nPointCount; ++j)
                                     {
                                         Point& rPoint = aLocalPoly[ j ];
                                         rPoint.X() -= nLeft;
@@ -758,6 +763,7 @@ void FitTextOutlinesToShapeOutlines( const tools::PolyPolygon& aOutlines2d, FWDa
                                         rPoint.X() = (sal_Int32)( fx1 + fWidth * fY );
                                         rPoint.Y() = (sal_Int32)( fy1 + fHeight* fY );
                                     }
+                                }
 
                                 // write back polygon
                                 rPolyPoly[ i ] = aLocalPoly;