sunavl: don't rely on users of avl.h to have a definition for uintptr_t
sunavl: don't rely on users of avl.h to have a definition for uintptr_t

Signed-off-by: Josef 'Jeff' Sipek <a620f141433c70aa9e43778305a6c68cbfadfb25@josefsipek.net>

jeffpc/nx01