Fixed uninitialized variable in ElephantFootCompensation

src/libslic3r/ElephantFootCompensation.cpp

@@ -258,6 +258,7 @@ std::vector<float> contour_distance2(const EdgeGrid::Grid &grid, const size_t id
                 this->point      = apoint;
                 this->found      = false;
                 this->dir_inside = this->dir_inside_at_point(contour, this->idx_point);
+                this->distance   = std::numeric_limits<double>::max();
             }
 
 			bool operator()(coord_t iy, coord_t ix) {