fix compiler warnings - unused vars/funcs, invalid casts
    
    This commit fixes many compiler warnings, mostly for things like unused
    variables, functions, goto labels.
    One place was using csngen_free instead of csn_free.  A couple of places
    were using casts incorrectly, and several places needed some casts added.
    Tested on: RHEL5 x86_64, Fedora 14 x86_64
    Reviewed by: nkinder (Thanks!)