Change adjective declension 3 to 33

To keep the same pattern we use in our noun declension system, this PR changes the declension number of adjectives:
33 (former 3) now is mixed adj declension for words like facilis, atrox etc. 3 covers now consonantic declension types like vetus, pauper etc

The consonantic ending path was already in our system (cf declension of comparatives), but was not in use for positives adjectives. This PR just adds the path at the correct place.