Ticket 47892 - Fix remaining compiler warnings
    
    Description:  Fix the remaining compiler warnings from ds/lib/base/system.cpp
    
    https://fedorahosted.org/389/ticket/47892
    
    Reviewed by: nhosoi(Thanks!)
    
    (cherry picked from commit 5f3aaa2872d69c5900eaf52d7e9fc2f1bcea475e)