Code cleanup: Use const & where possible

Author: joto

src/geom-from-osm.cpp

@@ -139,7 +139,7 @@ void create_multilinestring(geometry_t *geom,
     auto ways = buffer.select<osmium::Way>();
     if (ways.size() == 1 && !force_multi) {
         auto &line = geom->set<linestring_t>();
-        auto &way = *ways.begin();
+        auto const &way = *ways.begin();
         if (!fill_point_list(&line, way.nodes())) {
             geom->reset();
         }

src/geom.hpp

@@ -373,13 +373,13 @@ class geometry_t
 
 }; // class geometry_t
 
-inline std::size_t dimension(nullgeom_t) noexcept { return 0; }
-inline std::size_t dimension(point_t) noexcept { return 0; }
-inline std::size_t dimension(linestring_t) noexcept { return 1; }
-inline std::size_t dimension(polygon_t) noexcept { return 2; }
-inline std::size_t dimension(multipoint_t) noexcept { return 0; }
-inline std::size_t dimension(multilinestring_t) noexcept { return 1; }
-inline std::size_t dimension(multipolygon_t) noexcept { return 2; }
+inline std::size_t dimension(nullgeom_t const &) noexcept { return 0; }
+inline std::size_t dimension(point_t const &) noexcept { return 0; }
+inline std::size_t dimension(linestring_t const &) noexcept { return 1; }
+inline std::size_t dimension(polygon_t const &) noexcept { return 2; }
+inline std::size_t dimension(multipoint_t const &) noexcept { return 0; }
+inline std::size_t dimension(multilinestring_t const &) noexcept { return 1; }
+inline std::size_t dimension(multipolygon_t const &) noexcept { return 2; }
 
 std::size_t dimension(collection_t const &geom);