add -Wunused-but-set-variable
authorOleksij Rempel <linux@rempel-privat.de>
Thu, 13 Oct 2016 07:41:06 +0000 (09:41 +0200)
committerOleksij Rempel <linux@rempel-privat.de>
Sat, 15 Oct 2016 13:55:49 +0000 (15:55 +0200)
we can't just now use -Wall. So lets add them step by step.
-Wunused-but-set-variable seems to be a good start :)

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>

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