Optimize the display

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/sensor.c b/sensor.c
index 399605b..2a8f4bb 100644
--- a/sensor.c
+++ b/sensor.c
@@ -243,7 +243,7 @@
 	if (asprintf(&buf, "%-36s%s", "Name", "Value") < 0)
 		return -1;
 
-	ret = display_header_footer(SENSOR, buf);
+	ret = display_column_name(buf);
 
 	free(buf);