/*
   * Check and fix inconsistencies of the installed system
   *
   * Normally, broken dependencies in the RPM database are silently
   * ignored in order to prevent clutter in the solution.
   * Setting fix_system to 'true' will repair broken system
   * dependencies.
   *
   * call-seq:
   *  solver.fix_system -> bool
   *
   */
  int fix_system()