fix pybb/subscription.py
fix pybb/subscription.py

springmerchant/pybbm,katsko/pybbm,hovel/pybbm,concentricsky/pybbm,ttyS15/pybbm,concentricsky/pybbm,just-work/pybbm,zekone/dj_pybb,just-work/pybbm,NEERAJIITKGP/pybbm,katsko/pybbm,just-work/pybbm,jonsimington/pybbm,acamposruiz/quecoins,NEERAJIITKGP/pybbm,artfinder/pybbm,webu/pybbm,wengole/pybbm,katsko/pybbm,jonsimington/pybbm,onecue/pybbm,DylannCordel/pybbm,hovel/pybbm,DylannCordel/pybbm,skolsuper/pybbm,hovel/pybbm,wengole/pybbm,zekone/dj_pybb,onecue/pybbm,ttyS15/pybbm,skolsuper/pybbm,zekone/dj_pybb,artfinder/pybbm,springmerchant/pybbm,artfinder/pybbm,webu/pybbm,onecue/pybbm,skolsuper/pybbm,acamposruiz/quecoins,DylannCordel/pybbm,wengole/pybbm,acamposruiz/quecoins,ttyS15/pybbm,webu/pybbm,concentricsky/pybbm,jonsimington/pybbm,springmerchant/pybbm,NEERAJIITKGP/pybbm