Get rid of a global copy of the parent class. Implement ec, ic, and IC
Get rid of a global copy of the parent class. Implement ec, ic, and IC

* vte.c: Get rid of a global copy of the parent class.
* vte.c: Implement ec, ic, and IC handlers.

rvu95/vte,asivokon/vte-fx,gloob/vte-copy,thestinger/vte-ng,thestinger/vte-ng,jessevdk/vte,jessevdk/vte,gloob/vte-copy,aligo/vte,rvu95/vte,jessevdk/vte,asivokon/vte-fx,flaxandteal/gasket-vte,saitoha/vte-sixel,pjm0616/vte,pjm0616/vte,asivokon/vte-fx,flaxandteal/gasket-vte,pjm0616/vte,flaxandteal/gasket-vte,gloob/vte-copy,rvu95/vte,flaxandteal/gasket-vte,thestinger/vte-ng,asivokon/vte-fx,saitoha/vte-sixel,jessevdk/vte,aligo/vte,aligo/vte,rvu95/vte,saitoha/vte-sixel