CodeWriter: Support non-constant expressions as default arguments
CodeWriter: Support non-constant expressions as default arguments

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