b56c07a parallels: fix getJobResultHelper

1 file Authored by Dmitry Guryanov 9 years ago, Committed by Peter Krempa 9 years ago,
    parallels: fix getJobResultHelper
    
    When PrlJob_GetRetCode sets second argument to
    error value it means sdk function failed and we
    must return error from getJobResultHelper.
    
    Signed-off-by: Dmitry Guryanov <dguryanov@parallels.com>