staging: iio: tsl2583: fix comparison between signed and unsigned integers

Fixed warning found by make W=2:

warning: comparison between signed and unsigned integer expressions
[-Wsign-compare]

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Brian Masney 2016-11-12 13:19:25 -05:00 • committed by Jonathan Cameron
commit 6d94de6aaf