codegen: Use destroy_value in emit_simple_assignment
codegen: Use destroy_value in emit_simple_assignment

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