Fix "use of memory after freed" warning.

Static analyzer gets confused in the code to free a linked list.
To avoid confusion add an "assert" to tell the analyzer there is no
alias between the memory being deleted and accessed.

Bug: b/27101951
Test: Warning is gone.
Change-Id: Ia6661ee76908c2025b5e1a764d25ba3e11bf44c8
1 file changed