Fixed error messages for :cPySequence_Size, :cPySequence_GetItem, :cPySequence_SetItem and :cPySequence_DelItem called with a mapping and :cPyMapping_Size called with a sequence.
Fixed error messages for :cPySequence_Size, :cPySequence_GetItem, :cPySequence_SetItem and :cPySequence_DelItem called with a mapping and :cPyMapping_Size called with a sequence.