message: Fix a Python error during stability calculation
diff: @@ -1057,8 +1057,9 @@ def calculateStability(iPlayer):
  iRelationWeaker = 0
  iNegativeWeaker = max(0, count(lWeakerAttitudes, lambda x: x < -1) - count(lWeakerAttitudes, lambda x: x >= 3 + iAttitudeThresholdModifier))
  +
  if iNegativeWeaker > 0:
  - iRelationWeaker = -8 * min(iNegativeWeaker, len(lWeakerAttitudes) / 2) / (len(lWeakerAttitudes) / 2)
  + iRelationWeaker = -8 * min(iNegativeWeaker, len(lWeakerAttitudes) / 2) / max(1, len(lWeakerAttitudes) / 2)
  iRelationWeaker = max(iRelationWeaker, -len(lWeakerAttitudes))
  iRelationEqual = sum(iAttitude / 5 for iAttitude in lEqualAttitudes if abs(iAttitude) > 2)
  