Optimize the display

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/display.h b/display.h
index 8586f5e..f9a762c 100644
--- a/display.h
+++ b/display.h
@@ -29,5 +29,5 @@
 
 extern int display_init(int wdefault);
 extern int display_register(int win, struct display_ops *ops);
-extern int display_header_footer(int win, const char *line);
 extern int display_refresh(int win);
+extern int display_column_name(const char *line);