StderrOutput      160 magick/log.c       { "stderr", StderrOutput },
StderrOutput      211 magick/log.c         log_info->output_type=StderrOutput;
StderrOutput      654 magick/log.c         (((unsigned int) log_info->output_type) & StderrOutput))
StderrOutput      662 magick/log.c         if (((unsigned int) log_info->output_type) & StderrOutput)