Corrected directory view for known file types

src/directories.cpp

@@ -702,11 +702,8 @@ void Directories::add_or_update_path(const boost::filesystem::path &dir_path, co
         grandchild->set_value(column_record.markup, Glib::Markup::escape_text("(empty)"));
         grandchild->set_value(column_record.type, PathType::unknown);
       }
-      else {
+      else
-        auto language = Source::guess_language(filename.first);
+        child->set_value(column_record.type, Source::guess_language(filename.second) ? PathType::known : PathType::unknown);
-        if(!language)
-          child->set_value(column_record.type, PathType::unknown);
-      }
     }
   }
   if(children.empty()) {