Don't implicitly cast NULL to a bool

The code is wrong and causes an error when building with clang 3.4
(-Werror,-Wnull-conversion)

Change-Id: I223649ebcebf6f5df4b1024651bf07e85288f0b8
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
1 file changed