codegen: Use builder API to free captured variables
codegen: Use builder API to free captured variables

rvu95/vala,Distrotech/vala,playya/vala,GNOME/vala,spidermonkdust/vala,GNOME/vala,frida/vala,jessevdk/vala,xdave/pvala,jessevdk/vala,spidermonkdust/vala,Distrotech/vala,severinh/vala,frida/vala,rvu95/vala,tjol/vala-tjol,tjol/vala-tjol,jessevdk/vala,frida/vala,playya/vala,Distrotech/vala,flobrosch/vala-fixes,flobrosch/vala-fixes,frida/vala,kamanashisroy/aroop,playya/vala,tjol/vala-tjol,GNOME/vala,severinh/vala,kamanashisroy/aroop,flobrosch/vala-fixes,kamanashisroy/aroop,frida/vala,GNOME/vala,rvu95/vala,severinh/vala,spidermonkdust/vala