Explicitly initialize the markBit to 0. This is important
for stack based execution contexts that can have uninitialized
data in the bit.
Change-Id: I50f1286949f1b4732e3a31b83b238bc7dcf7c7a7 Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com> Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>