Add force evaluation back.

Former-commit-id: df259348ae0ef048db9019901464a565db7c1f89

include/igl/copyleft/cgal/assign_scalar.cpp

@@ -15,9 +15,10 @@ IGL_INLINE void igl::copyleft::cgal::assign_scalar(
 }
 
 IGL_INLINE void igl::copyleft::cgal::assign_scalar(
-  const typename CGAL::Epeck::FT & cgal,
+  const typename CGAL::Epeck::FT & _cgal,
   double & d)
 {
+  const typename CGAL::Epeck::FT cgal = _cgal.exact();
   const auto interval = CGAL::to_interval(cgal);
   d = interval.first;
   do {
@@ -28,9 +29,10 @@ IGL_INLINE void igl::copyleft::cgal::assign_scalar(
 }
 
 IGL_INLINE void igl::copyleft::cgal::assign_scalar(
-  const typename CGAL::Epeck::FT & cgal,
+  const typename CGAL::Epeck::FT & _cgal,
   float& d)
 {
+  const typename CGAL::Epeck::FT cgal = _cgal.exact();
   const auto interval = CGAL::to_interval(cgal);
   d = interval.first;
   do {