Fixed #1173 (DXF reader compatibility issue with ezdxf) (#1174)

src/plugins/streamers/dxf/db_plugin/dbDXFReader.cc

@@ -1732,7 +1732,7 @@ DXFReader::read_entities (db::Layout &layout, db::Cell &cell, const db::DVector
 
       std::vector<double> knots;
       std::vector<std::pair<db::DPoint, double> > control_points;
-      db::DPoint pc;
+      std::vector<double> weights;
       double ex = 0.0, ey = 0.0, ez = 1.0;
 
       std::string layer;
@@ -1771,12 +1771,7 @@ DXFReader::read_entities (db::Layout &layout, db::Cell &cell, const db::DVector
         } else if (g == 40) {
           knots.push_back (read_double ());
         } else if (g == 41) {
-
+          weights.push_back (read_double ());
-          //  weight of the control point
-          if (! control_points.empty ()) {
-            control_points.back ().second = read_double ();
-          }
-
         } else if (g == 210) {
           ex = read_double ();
         } else if (g == 220) {
@@ -1788,6 +1783,10 @@ DXFReader::read_entities (db::Layout &layout, db::Cell &cell, const db::DVector
         }
       }
 
+      for (size_t i = 0; i < weights.size () && i < control_points.size (); ++i) {
+        control_points [i].second = weights [i];
+      }
+
       db::DCplxTrans tt = global_trans (offset, ex, ey, ez);
 
       std::pair <bool, unsigned int> ll = open_layer (layout, layer);

src/plugins/streamers/dxf/unit_tests/dbDXFReaderTests.cc

@@ -506,3 +506,12 @@ TEST(33)
   opt.polyline_mode = 2;
   run_test (_this, "t33.dxf.gz", "t33e_au.gds.gz", opt);
 }
+
+//  issue #1173
+TEST(34)
+{
+  db::DXFReaderOptions opt;
+  opt.polyline_mode = 3;
+
+  run_test_public (_this, "issue_1173.dxf", "issue_1173_au.gds.gz", opt);
+}