fix node build

Author: Molly Lloyd

src/mbgl/renderer/render_source.hpp

@@ -84,7 +84,7 @@ class RenderSource : protected TileObserver {
 
     bool enabled = false;
 
-    virtual void onTileChanged(Tile&);
+    void onTileChanged(Tile&);
     void onTileError(Tile&, std::exception_ptr) final;
 };
 

src/mbgl/renderer/sources/render_raster_dem_source.cpp

@@ -55,6 +55,7 @@ void RenderRasterDEMSource::update(Immutable<style::Source::Impl> baseImpl_,
                        SourceType::RasterDEM,
                        impl().getTileSize(),
                        tileset->zoomRange,
+                       tileset->bounds,
                        [&] (const OverscaledTileID& tileID) {
                            return std::make_unique<RasterDEMTile>(tileID, parameters, *tileset);
                        });

src/mbgl/renderer/sources/render_raster_dem_source.hpp

@@ -43,7 +43,7 @@ class RenderRasterDEMSource : public RenderSource {
     optional<std::vector<std::string>> tileURLTemplates;
 
 protected:
-    void onTileChanged(Tile&);
+    void onTileChanged(Tile&) override;
 };
 
 template <>