valid_bind
NAME
valid_bind - controls the use of the bind() efun
SYNOPSIS
int valid_bind(object binder, object old_owner, object new_owner)
DESCRIPTION
This routine is called with 'binder' attempts to use the bind() efun to
make a function pointer which belongs to 'old_owner' belong to
'new_owner'. If this routine returns 1, the call is allowed, otherwise
an error is generated.