fix the name of a declared function (was _set_size, is _size_set)
fix the name of a declared function (was _set_size, is _size_set)

* vte.c: fix the name of a declared function (was _set_size, is _size_set)

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