Bug 584563 – default commit signal handler first param fix.
Bug 584563 – default commit signal handler first param fix.

First parameter of default commit signal handler now takes const
gchar* instead of gchar*.

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