-Werror,-Wundefined-bool-conversion

Change-Id: I52d9ae4daf8e4f904f18b150a4adaad9d2921e61
-Werror,-Wundefined-bool-conversion

Change-Id: I7b1252656a6ada4ab86151462629aaa952011b70
Dead code

Change-Id: Ib585af0755bdc6f7aeebc89d5d109d3bb6084e22
Change sw::mark::IMark::GetOtherMarkPos return type from ref to pointer

...so CrossRefBookmark::GetOtherMarkPos can legitimately return a null pointer

Change-Id: I88774cf0d139d017d67d6727ee01214997a73636
Duplicate #include

Change-Id: If83bcfb0e39c0b41ea5323b0ad3832bd65185c6c