the plot optional 'nameSave' found erros

[SHEN-Cheng]

In piwavelat.py , from line 1425-1449 ,i modify the code as follows

        if 'labels' in kwargs.keys():
            labels = kwargs['labels']
        else:
            labels=None

        if 'pArrow' in kwargs.keys():
            pArrow = kwargs['pArrow']
        else:
            pArrow=None

        if 'pSigma' in kwargs.keys():
            pSigma = kwargs['pSigma']
        else:
            pSigma=True

        if 'gray' in kwargs.keys():
            gray = kwargs['gray']
        else:
            gray = None

        if 'nameSave' in kwargs.keys():
            nameSave = kwargs['nameSave']
        else:
            nameSave = None

        if 'scale' in kwargs.keys():
            scale = kwargs['scale']
        else:
            scale = 'log2'

the 'nameSave' optional parameter is OK , but levels and labels still down.
Regard
Shen