fixed crash when parameter viewbox=null in nr_path_matrix_point_bbox_wind_distance

diff --git a/src/libnr/nr-path.cpp b/src/libnr/nr-path.cpp
index bef6378f5fb7b4707b1e21e54780d635815c0553..03882a7fd9902c6c30124270e8db0317dd30a6fd 100644 (file)
--- a/src/libnr/nr-path.cpp
+++ b/src/libnr/nr-path.cpp
@@ -273,7 +273,7 @@ nr_path_matrix_point_bbox_wind_distance (NRBPath *bpath, NR::Matrix const &m, NR
                                        //std::cout << "swept: " << swept;
                                        //std::cout << "view: " << *viewbox;
                                        //std::cout << "intersects? " << (swept.intersects(*viewbox)? "YES" : "NO") << "\n";
-                                       if (swept.intersects(*viewbox))
+                                       if (!viewbox || swept.intersects(*viewbox))
                                        nr_line_wind_distance (x0, y0, x3, y3, pt, wind, dist);
                                }
                        }
@@ -293,7 +293,7 @@ nr_path_matrix_point_bbox_wind_distance (NRBPath *bpath, NR::Matrix const &m, NR
                        swept.expandTo(NR::Point(x1, y1));
                        swept.expandTo(NR::Point(x2, y2));
 
-                       if (swept.intersects(*viewbox)) { // we see this segment, so do full processing
+                       if (!viewbox || swept.intersects(*viewbox)) { // we see this segment, so do full processing
                                nr_curve_bbox_wind_distance (
                        x0, y0,
                        x1, y1,