Account for travel moves in elapsed_time

xs/src/libslic3r/GCode.cpp

@@ -629,9 +629,17 @@ GCode::travel_to(const Point &point, ExtrusionRole role, std::string comment)
     
     // use G1 because we rely on paths being straight (G0 may make round paths)
     Lines lines = travel.lines();
-    for (Lines::const_iterator line = lines.begin(); line != lines.end(); ++line)
-        gcode += this->writer.travel_to_xy(this->point_to_gcode(line->b), comment);
-    
+    double path_length = 0;
+    for (Lines::const_iterator line = lines.begin(); line != lines.end(); ++line) {
+	    const double line_length = line->length() * SCALING_FACTOR;
+	    path_length += line_length;
+
+	    gcode += this->writer.travel_to_xy(this->point_to_gcode(line->b), comment);
+    }
+
+    if (this->config.cooling)
+        this->elapsed_time += path_length / this->config.get_abs_value("travel_speed");
+
     return gcode;
 }