Follow-up of merge of pull request #3293 -> Fixed missing include (for MAC build)

src/libslic3r/GCode/PreviewData.cpp

@@ -1,6 +1,5 @@
 #include "Analyzer.hpp"
 #include "PreviewData.hpp"
-#include <float.h>
 #include <I18N.hpp>
 #include "Utils.hpp"
 

src/libslic3r/GCode/PreviewData.hpp

@@ -13,6 +13,8 @@
 #include <algorithm>
 #include <string>
 
+#include <float.h>
+
 namespace Slic3r {
 
 // Represents an RGBA color