readkey: keys are unsigned char
Otherwise values > 127 will become negative and are dropped.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 55d2952 commit 02a3c4f39690633ed9f0585a726d7665d7a4a941
@Michael Olbrich Michael Olbrich authored on 23 Jan 2017
Sascha Hauer committed on 24 Jan 2017
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lib/readkey.c