av: More ISO C++ 11 fixes

Change-Id: I84bfab66d561cb0ded6e312b8cfe02e5fe2a182f
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>