Change: Expose ObjectSpec vector to simplify iteration.

(cherry picked from commit 51b112139235c66c3adb2c3a75919fc1d3eff9fc)

src/newgrf_object.cpp

@@ -33,6 +33,11 @@ extern const ObjectSpec _original_objects[NEW_OBJECT_OFFSET];
 /** All the object specifications. */
 std::vector<ObjectSpec> _object_specs;
 
+const std::vector<ObjectSpec> &ObjectSpec::Specs()
+{
+	return _object_specs;
+}
+
 size_t ObjectSpec::Count()
 {
 	return _object_specs.size();