post changes after merging BS1.7.4

Remove tracking etc..

src/libslic3r/ExPolygon.cpp

@@ -183,10 +183,10 @@ bool overlaps(const ExPolygons& expolys1, const ExPolygons& expolys2)
         }
     }
     return false;
-}
-
-Point projection_onto(const ExPolygons& polygons, const Point& from)
-{
+}
+
+Point projection_onto(const ExPolygons& polygons, const Point& from)
+{
     Point projected_pt;
     double min_dist = std::numeric_limits<double>::max();