Can't build on Clang on latest OSX

[ruipacheco]

/Users/ruipacheco/Projects/xxx/fff/lib/intrusive/List.h:310:20: error: declaration of 'T' shadows template parameter

/Users/ruipacheco/Projects/xxx/fff/lib/intrusive/List.h:424:5: error: use of undeclared identifier 'ASSERT' ASSERT(!((size_t) node & 1));