update libslic3r

src/libslic3r/EdgeGrid.cpp

@@ -1,9 +1,9 @@
 #include <algorithm>
 #include <vector>
-#include <float.h>
 #include <unordered_map>
-
-#include <png.h>
+#include <cstdint>
+#include <set>
+#include <cfloat>
 
 #include "libslic3r.h"
 #include "ClipperUtils.hpp"
@@ -11,6 +11,9 @@
 #include "Geometry.hpp"
 #include "SVG.hpp"
 #include "PNGReadWrite.hpp"
+#include "libslic3r/BoundingBox.hpp"
+#include "libslic3r/ExPolygon.hpp"
+#include "libslic3r/Point.hpp"
 
 // #define EDGE_GRID_DEBUG_OUTPUT
 
@@ -21,8 +24,6 @@
 #undef NDEBUG
 #endif
 
-#include <assert.h>
-
 namespace Slic3r {
 
 void EdgeGrid::Grid::create(const Polygons &polygons, coord_t resolution)