lib/powerpoint/slide/intro.rb in powerpoint-1.7 vs lib/powerpoint/slide/intro.rb in powerpoint-1.8

@@ -16,9 +16,13 @@
       def save(extract_path, index)
         save_rel_xml(extract_path, index)
         save_slide_xml(extract_path, index)
       end
 
+      def file_type
+        nil
+      end
+
       def save_rel_xml(extract_path, index)
         render_view('textual_rel.xml.erb', "#{extract_path}/ppt/slides/_rels/slide#{index}.xml.rels")
       end
       private :save_rel_xml