- Removed currentFramePtr (the pointer from the xotcl stack to the tcl stack) from the call stack content. Now, all access to the call stack content happens via the tcl85stack. - For the time being, the xotcl stack is purely an allocation stack (we still have to evaluate, where we should store the call stack content efficiently: some options: via alloca, on the c-stack, on the tcl stack, on an allocation stack)