and exec_team() have an additional "kernel" argument and will copy the arguments
themselves (or rather, delegate that to create_team_arg()).
When team_create_thread_start() is called, it will take over ownership and is
responsible for deleting it - this also fixed a memory leak in case the user
stack area couldn't be created.
Also changed comment after exit_thread(): since this call only delivers a signal, the
code after it will still get executed.
This fixes the crashing symptom of bug #50.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14303 a95241bf-73f2-0310-859d-f6bbb57e9c96