InflatePaths doesn't check that its result stays in-range

[ccoustet]

Hi everyone,
InflatePaths doesn't check that its result stays in-range (it checks its input, though).
If slightly out-of-range, the result can look OK, but is not accepted as an input of a second InflatePaths because being out-of-range.
Going too far out-of-range results in an empty polygon.
In either case, no exception is raised.

PathsD polyline, solution;
PointD coords[4] = {{-2305843009213.,1.}, {1.,5.}, {5.,5.}, {5.,1.}};
polyline.push_back(PathD(std::begin(coords), std::end(coords)));
// offset polyline
std::cout << "Huge offset" << std::endl;
solution = InflatePaths(polyline, 1e30, JoinType::Miter, EndType::Polygon, 2 , 6);
//print inflated solution
std::cout << solution;
polyline.push_back(PathD(std::begin(coords), std::end(coords)));
// offset polyline
std::cout << "Small offset" << std::endl;
solution = InflatePaths(polyline, 1, JoinType::Miter, EndType::Polygon, 2 , 6);
//print inflated solution
std::cout << std::setprecision(15) << solution;
//try to use polygon in another InflatePaths call
std::cout << "Small offset" << std::endl;
InflatePaths(solution, 1, JoinType::Miter, EndType::Polygon, 2 , 6);


Huge offset
Small offset
-2305843009214,0 , -2305843009214,2 , 1,6 , 6,6 , 6,0 
Small offset
terminate called after throwing an instance of 'Clipper2Lib::Clipper2Exception'
  what():  Values exceed permitted range

[AngusJohnson]

Hopefully fixed now.