List iterators should conform to upstream discussion. List iterators that
reach end of list do not point to NULL but rather they point to list_head.
Dereferencing the iterator in this case would break the list. The scope of
the list iterator should be confined to the loop. Solution is to use assign
ptr to iterator when condition is met, this ptr can be used outside of the
loop.
Change-Id: Ia55da61b0f25a0de9a4070d89eae11327e4753ef
CRs-Fixed: 3331679
3e11a3a0fb