Strange warnings when using altx

[syrte]

Description

I get a bunch of warnings when calling altx. It may do no harm. Just report the behaviour for reference

Steps to reproduce

With the following code

import numpy as np
from matplotlib import pyplot as plt
import proplot as pplt

fig, ax = pplt.subplot(journal='nat1', refaspect=1)
ax.format(yscale='log', ylim=(1e-2, 1), yformatter='log')
ax.altx()  #  without this then everything will go well without warnings

I get a lot of warning message:

/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2613: UserWarning: AutoMinorLocator does not work with logarithmic scale
  self._tight_bbox = super().get_tightbbox(renderer, *args, **kwargs)
/opt/conda/lib/python3.8/site-packages/proplot/gridspec.py:820: UserWarning: AutoMinorLocator does not work with logarithmic scale
  bbox = fig.get_tightbbox(renderer)
/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2613: UserWarning: AutoMinorLocator does not work with logarithmic scale
  self._tight_bbox = super().get_tightbbox(renderer, *args, **kwargs)
/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2601: UserWarning: AutoMinorLocator does not work with logarithmic scale
  super().draw(renderer, *args, **kwargs)
/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2601: UserWarning: AutoMinorLocator does not work with logarithmic scale
  super().draw(renderer, *args, **kwargs)
/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2613: UserWarning: AutoMinorLocator does not work with logarithmic scale
  self._tight_bbox = super().get_tightbbox(renderer, *args, **kwargs)
/opt/conda/lib/python3.8/site-packages/proplot/gridspec.py:820: UserWarning: AutoMinorLocator does not work with logarithmic scale
  bbox = fig.get_tightbbox(renderer)
/opt/conda/lib/python3.8/site-packages/proplot/axes/base.py:2601: UserWarning: AutoMinorLocator does not work with logarithmic scale
  super().draw(renderer, *args, **kwargs)

Proplot version

Paste the results of import matplotlib; print(matplotlib.__version__); import proplot; print(proplot.version)here.

3.5.1
0.9.5.post289

[syrte]

FYI, one can get rid of the warnings by specifying ytickminor to anything. Any of these works for the above example.

ax.altx(ytickminor='log')
ax.altx(ytickminor=True)
ax.altx(ytickminor=False)