BUG: resample on PeriodIndex with 'W' causes recursion

[jreback]

In [32]: s = pd.Series(range(2), pd.period_range('1/1/1990', periods=2, freq='M'))

In [33]: s
Out[33]: 
1990-01    0
1990-02    1
Freq: M, dtype: int64

In [34]: s.resample('W').asfreq()

[jreback]

cc @MaximilianR

[max-sixty]

Works after #12874 !

In [12]: pd.Series(range(2), pd.period_range('1/1/1990', periods=2, freq='M')).resample('W').asfreq()
Out[12]: 
1990-01-01/1990-01-07    0.0
1990-01-08/1990-01-14    NaN
1990-01-15/1990-01-21    NaN
1990-01-22/1990-01-28    NaN
1990-01-29/1990-02-04    1.0
1990-02-05/1990-02-11    NaN
1990-02-12/1990-02-18    NaN
1990-02-19/1990-02-25    NaN
1990-02-26/1990-03-04    NaN
Freq: W-SUN, dtype: float64

[jreback]

ok great!

I'll close this, but pls add as a test (unless you have something close already)