[Tile-serving] [openstreetmap/osm2pgsql] Some more work in the geometries (PR #1743)

[Jochen Topf]

@joto commented on this pull request.



>          fill_point_list(&line, way.nodes());
-        if (line.size() >= 2U) {
-            mls.add_geometry(std::move(line));
+        if (line.size() < 2U) {
+            geom->reset();
+        }
+    } else {
+        auto &multiline = geom->set<multilinestring_t>();
+        for (auto const &way : ways) {
+            linestring_t line;
+            fill_point_list(&line, way.nodes());
+            if (line.size() >= 2U) {
+                multiline.add_geometry(std::move(line));
+            }
+        }

I put it on my todo list.

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