void PSOutputDev::addProcessColor(double c, double m, double y, double k) {
  if (c > 0) {
    processColors |= psProcessCyan;
  }
  if (m > 0) {
    processColors |= psProcessMagenta;
  }
  if (y > 0) {
    processColors |= psProcessYellow;
  }
  if (k > 0) {
    processColors |= psProcessBlack;
  }
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.