Added missing headers.

src/libslic3r/Fill/FillBase.hpp

@@ -6,6 +6,8 @@
 #include <float.h>
 #include <stdint.h>
 
+#include <type_traits>
+
 #include "../libslic3r.h"
 #include "../BoundingBox.hpp"
 #include "../PrintConfig.hpp"

src/libslic3r/Slicing.hpp

@@ -3,10 +3,11 @@
 #ifndef slic3r_Slicing_hpp_
 #define slic3r_Slicing_hpp_
 
-#include <set>
-#include <vector>
-#include <map>
 #include <cstring>
+#include <map>
+#include <set>
+#include <type_traits>
+#include <vector>
 
 #include "libslic3r.h"
 namespace Slic3r