Fix PostgreSQL size calculation (#4249)
Fix PostgreSQL size calculation (#4249)

Regression from https://github.com/FreshRSS/FreshRSS/pull/3488
aledeg/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS