Make const what can be const

Author: joto

src/coastline_ring_collection.cpp

@@ -384,7 +384,7 @@ void CoastlineRingCollection::close_rings(OutputDatabase& output, bool debug, do
             m_fixed_rings++;
 
             CoastlineRing* e = eit->second->get();
-            CoastlineRing* s = sit->second->get();
+            const CoastlineRing* s = sit->second->get();
 
             output.add_error_point(e->ogr_last_point(), "fixed_end_point", e->last_node_id());
             output.add_error_point(s->ogr_first_point(), "fixed_end_point", s->first_node_id());

src/output_database.cpp

@@ -181,7 +181,7 @@ void OutputDatabase::add_ring(std::unique_ptr<OGRPolygon>&& polygon, osmium::obj
            function from the GEOS C interface to get to the reason.
         */
         GEOSContextHandle_t contextHandle = OGRGeometry::createGEOSContext();
-        char* r = GEOSisValidReason(polygon->exportToGEOS(contextHandle));
+        const char* const r = GEOSisValidReason(polygon->exportToGEOS(contextHandle));
         std::string reason = r ? r : "";
         OGRGeometry::freeGEOSContext(contextHandle);