Added volatile to observeThreadAlive boolean since it is accessed by multiple threads
Added volatile to observeThreadAlive boolean since it is accessed by multiple threads

Signed-off-by: Roland Bewick <42ffbc7f64690fa2523289d2f0c3c0bbbf50c83f@imgtec.com>

FlowM2M/AwaLWM2M,DavidAntliff/AwaLWM2M,FlowM2M/AwaLWM2M,DavidAntliff/AwaLWM2M,FlowM2M/AwaLWM2M,FlowM2M/AwaLWM2M,DavidAntliff/AwaLWM2M,DavidAntliff/AwaLWM2M