Bugfix: time estimates for cooling were computed for each object separately instead of the whole actual layer. #1071

lib/Slic3r.pm

@@ -45,6 +45,7 @@ use Slic3r::Format::AMF;
 use Slic3r::Format::OBJ;
 use Slic3r::Format::STL;
 use Slic3r::GCode;
+use Slic3r::GCode::CoolingBuffer;
 use Slic3r::GCode::MotionPlanner;
 use Slic3r::Geometry qw(PI);
 use Slic3r::Layer;