* cleaned up ObjectList.h
* switched several uses of new() to new(std::nothrow)
* moved ugly AsBList() hack into BObjectList<>::Private class and
adjusted all callers accordingly
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40252 a95241bf-73f2-0310-859d-f6bbb57e9c96