Fixed typo.

src/read/load_data.m

@@ -51,7 +51,7 @@ elseif check_file_extension(filename,'db')
     FameInfo = fame.open.connector();
     db = fame.open.database(FameInfo, filename);
     [data, init, varlist] = fame.getall.timeseries(db);
-    fame.close.database(fid);
+    fame.close.database(db);
     fame.close.connector(FameInfo);
 else
     error('dseries:WrongInputArguments', 'I''m not able to load data from %s!', filename);