base

Use fabsf() rather than abs()

abs() operates on integers -- to check floats accurately, fabsf
should be used.

Change-Id: I1a4e85f8f5e0d08ff38d307c5c31e2b6783ab7af
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>