tree 57692ea12dfe86b9925b82ed5562e76c9aefb8a1
parent c0fc7940df40de07320c9b2cdd5525659d16805a
author Pau Espin Pedrol <pespin@sysmocom.de> 1509646094 +0100
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> 1510332302 +0000

vty: Fix bad use of vector_slot()

Commit in e9e9e427b78271941a25a63567fc2ec2bb9e4433 attempted to fix a
compilation warning but introduced a regression documented in OS#2613.

The commit was reverted in 4aa0258269296f078e685e21fb08b115567e814.

After closer lookup and testing, it seems vector_slot(vline, index) is
expected to be NULL in this case as set by vty_complete_command:
	/* In case of 'help \t'. */
	if (isspace((int)vty->buf[vty->length - 1]))
		vector_set(vline, NULL);

As a result, the correct fix for the compilation warning is to test
against NULL instead of testing for empty string.

Change-Id: Id9e02bbf89e0a94e1766b1efd236538712415c8a