message: address clang static analyzer warning
  warning: Although the value stored to 'pid' is used in the enclosing expression, the value is never actually read from 'pid' [deadcode.DeadStores]
diff: @@ -192,8 +192,7 @@ std::string read_ndctl_info( std::ofstream& logfile ) {
  exit(50);
  }
  std::stringstream ndctl;
  - int pid;
  - if ( (pid = fork()) == 0 ) {
  + if ( fork() == 0 ) {
  // child, writes to pipe, close read-end
  close( pipes[0] );
  dup2( pipes[1], fileno(stdout) );
  